US StockDetailed Quotes

Provided by Tiger Trade Technology Pte. Ltd.

National Presto

152.13

+0.11500.08%

Volume:58.86K

Turnover:8.95M

Market Cap:1.09B

PE:25.44

High:154.50

Open:154.50

Low:151.19

Close:152.01

52wk High:158.17

52wk Low:91.28

Shares:7.15M

Float Shares:5.01M

Volume Ratio:0.70

T/O Rate:1.17%

Dividend:1

Dividend Rate:0.66%

EPS(TTM):5.98

EPS(LYR):4.63

ROE:10.90%

ROA:6.54%

PB:2.65

PE(LYR):32.86

Loading ...

Overview Company News Filings

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

[Rev.]Quaterly Report

[Amend] Quarterly report [Sections 13 or 15(d)]

[Rev.]Annual Report

[Amend] Annual report [Section 13 and 15(d), not S-K Item 405]

Major Issues Report

Current report, item 8.01

Major Issues Report

Current report, items 3.01 and 9.01

Major Issues Report

Current report, items 8.01 and 9.01

Statement Of Changes In Beneficial Ownership

Initial statement of beneficial ownership of securities

Major Issues Report

Current report, items 5.02, 5.07, and 9.01

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

[Rev.]Quaterly Report

Correspondence

Correspondence

[Rev.]Annual Report

Major Issues Report

Major Issues Report

{"basename":"","ssrTDKData":{"titleTemplate":"%s - Tiger Brokers","title":"Tiger Brokers HK | Online Trading in stocks, bonds & ETFS","description":"Discover Tiger Brokers HK, an online trading platform for stocks&ETFs, options&futures, bonds and crypto. Open an account to enjoy low commission trading today!","keywords":"tiger trading,tiger security,tiger broker hk,tigers co ltd,tiger trade hk,tiger brokers hk,stock broker,securities broker,online brokerage,hong kong broker,hk broker,online stock trading,online trading platform,stock trading platforms,trading application,stock trading,stock trading hong kong,buying stocks in hong kong,tiger brokers","social":{"ogDescription":"Discover Tiger Brokers HK, an online trading platform for stocks&ETFs, options&futures, bonds and crypto. Open an account to enjoy low commission trading today!","ogImage":"https://c1.itigergrowtha.com/portal5/static/media/og-logo.0a0bd8dc.png","ogUrl":"https://www.tigrgood.cn/stock/NPK/filings?page=6"},"companyName":"Tiger Brokers"},"pageData":{"isMobile":false,"isTiger":false,"isTTM":true,"region":"HKG","license":"TBHK","edition":"fundamental","symbol":"NPK","isAnalysisPage":false},"__swrFallback__":{"@#url:\"https://hq.skytigris.cn/stock_info/detail/global\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"NPK\",,,,,undefined,":{"symbol":"NPK","market":"US","secType":"STK","nameCN":"National Presto","latestPrice":152.125,"timestamp":1791573652957,"preClose":152.01,"halted":0,"volume":58858,"delay":0,"changeRate":0.0007565291757121841,"floatShares":5011947,"shares":7151940,"eps":5.978929,"marketStatus":"Trading","change":0.115,"latestTime":"10-09 15:20:54 EDT","open":154.495,"high":154.495,"low":151.19,"amount":8945025.77404,"amplitude":0.021742,"askPrice":152.21,"askSize":9,"bidPrice":151.6,"bidSize":1,"shortable":3,"etf":0,"ttmEps":5.978929,"tradingStatus":2,"nextMarketStatus":{"tag":"Post-Mkt","tradingStatus":3,"beginTime":1791576000000},"marketStatusCode":2,"adr":0,"adrRate":0,"exchange":"NYSE","adjPreClose":152.01,"dividendRate":0.006574,"preHourTrading":{"tag":"盘前","latestPrice":151.64,"preClose":152.01,"latestTime":"09:25 EDT","volume":3,"amount":454.76000999999997,"timestamp":1791552343631,"change":-0.37,"changeRate":-0.002434,"amplitude":0.000526},"postHourTrading":{"tag":"盘后","latestPrice":152.01,"preClose":152.01,"latestTime":"17:46 EDT","volume":701,"amount":106559.01,"timestamp":1791496001143,"change":0,"changeRate":0,"amplitude":0},"volumeRatio":0.698532},"@#url:\"https://hq.skytigris.cn/stock_info/fundamental/all\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"NPK\",,,,,undefined,":{"symbol":"NPK","floatShares":5011947,"roa":"6.54%","roe":"10.90%","lyrEps":4.629075,"volumeRatio":0.698532,"shares":7151940,"dividePrice":1,"high":154.495,"amplitude":0.021742,"preClose":152.01,"low":151.19,"week52Low":91.28,"pbRate":"2.65","psRate":"2.00","week52High":158.17,"institutionHeld":0.6235,"latestPrice":152.125,"committee":-0.8,"eps":5.978929,"divideRate":0.006574,"volume":58858,"delay":0,"ttmEps":5.978929,"open":154.495,"prevYearClose":106.76,"prevWeekClose":150.73,"prevMonthClose":148.16,"prevQuarterClose":148.16,"fiveDayClose":150.73,"twentyDayClose":154.28,"sixtyDayClose":122.08,"dividendPayoutRate":0.21602587990041205,"dividendFrequency":"A","dividendGrowthYears":0,"dividendGrowthRate":-0.7777777777777778,"fiveYearAvgDividendRate":0.04949439624189851},"@#url:\"https://hq.skytigris.cn/fundamental/corporate_actions/details/NPK\",params:#limit:5,,,undefined,":[{"market":"US","date":"2026-07-31","symbol":"NPK","fiscalQuarterEnding":null,"expectedEps":null,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1785470400000,"reportTimeType":"post","actualEps":null},{"market":"US","date":"2026-05-01","symbol":"NPK","fiscalQuarterEnding":null,"expectedEps":null,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1777608000000,"reportTimeType":"post","actualEps":null},{"date":"2026-03-09","symbol":"NPK","amount":1,"announcedDate":"2026-02-27","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-03-09","defaultRemindTime":1773063000000,"name":"National Presto Industries Inc","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-03-20","payableDate":"2026-03-09","currency":"USD","dateTimestamp":1773028800000,"payDate":"2026-03-20"},{"market":"US","date":"2026-02-27","symbol":"NPK","fiscalQuarterEnding":null,"expectedEps":null,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1772168400000,"reportTimeType":"post","actualEps":null},{"market":"US","date":"2025-10-24","symbol":"NPK","fiscalQuarterEnding":null,"expectedEps":null,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1761278400000,"reportTimeType":"post","actualEps":null}],"@#url:\"https://hq.skytigris.cn/fundamental/dividend/history\",params:#symbol:\"NPK\",market:\"US\",,,undefined,":[{"executeDate":"2017-02-27","recordDate":"2017-03-01","paymentDate":"2017-03-15","value":4.5,"currency":"USD"},{"executeDate":"2018-02-28","recordDate":"2018-03-01","paymentDate":"2018-03-15","value":5,"currency":"USD"},{"executeDate":"2020-02-28","recordDate":"2020-03-02","paymentDate":"2020-03-13","value":5,"currency":"USD"},{"executeDate":"2021-02-26","recordDate":"2021-03-01","paymentDate":"2021-03-12","value":5.25,"currency":"USD"},{"executeDate":"2022-02-28","recordDate":"2022-03-01","paymentDate":"2022-03-15","value":4.5,"currency":"USD"}],"@#url:\"https://hq.skytigris.cn/fundamental/estimate/recommendation\",params:#symbol:\"NPK\",market:\"US\",delay:false,,,undefined,":{"strongBuy":0,"buy":0,"hold":1,"sell":0,"strongSell":0,"meanLabel":"HOLD","meanPercent":1,"analysts":1,"updateTime":1791432000000},"@#url:\"https://hq.skytigris.cn/value_analysis/stock/NPK\",params:#withQuantilePoint:true,period:\"5year\",factor:\"peRate\",delay:false,algorithm:1,,,undefined,":{"brief":{"id":"NPK","date":"2026-10-08","current":25.390835,"percent":0.78905,"low":12.95143,"twenty":16.265051,"median":20.567496,"eighty":24.775273,"high":32.458447,"avg":21.02398,"sd":4.574842,"marketCap":1053854374},"quantilePoints":[{"date":"2021-10-15","current":13.167182,"twenty":13.554973,"median":17.455768,"eighty":19.219015,"marketCap":584148854},{"date":"2021-10-22","current":13.205256,"twenty":13.51259,"median":17.455768,"eighty":19.219015,"marketCap":585837959},{"date":"2021-10-29","current":13.190978,"twenty":13.475328,"median":17.455337,"eighty":19.219015,"marketCap":585204544},{"date":"2021-11-05","current":14.011151,"twenty":13.47258,"median":17.455337,"eighty":19.219015,"marketCap":621590684},{"date":"2021-11-12","current":17.31656,"twenty":13.47258,"median":17.448341,"eighty":19.219015,"marketCap":629543554},{"date":"2021-11-19","current":16.729985,"twenty":13.47258,"median":17.448341,"eighty":19.219015,"marketCap":608218601},{"date":"2021-11-26","current":16.047329,"twenty":13.47258,"median":17.445752,"eighty":19.219015,"marketCap":583400656},{"date":"2021-12-03","current":15.909842,"twenty":13.47258,"median":17.425606,"eighty":19.219015,"marketCap":578402292},{"date":"2021-12-10","current":16.0086,"twenty":13.473006,"median":17.360143,"eighty":19.21816,"marketCap":581992666},{"date":"2021-12-17","current":15.704578,"twenty":13.473006,"median":17.273857,"eighty":19.215702,"marketCap":570939945},{"date":"2021-12-23","current":15.92146,"twenty":13.473006,"median":17.224584,"eighty":19.205228,"marketCap":578824689},{"date":"2021-12-31","current":15.884668,"twenty":13.473006,"median":17.184504,"eighty":19.183992,"marketCap":577487098},{"date":"2022-01-07","current":16.173198,"twenty":13.473431,"median":17.150039,"eighty":19.1741,"marketCap":587976624},{"date":"2022-01-14","current":16.953586,"twenty":13.473431,"median":17.117631,"eighty":19.163217,"marketCap":616347622},{"date":"2022-01-21","current":15.998918,"twenty":13.473431,"median":16.982061,"eighty":19.159377,"marketCap":581640669},{"date":"2022-01-28","current":15.896286,"twenty":13.473431,"median":16.904231,"eighty":19.153221,"marketCap":577909495},{"date":"2022-02-04","current":15.849812,"twenty":13.473431,"median":16.849887,"eighty":19.142253,"marketCap":576219907},{"date":"2022-02-11","current":16.022155,"twenty":13.473431,"median":16.799263,"eighty":19.126104,"marketCap":582485463},{"date":"2022-02-18","current":15.328908,"twenty":13.473431,"median":16.645474,"eighty":19.100977,"marketCap":557282442},{"date":"2022-02-25","current":16.169325,"twenty":13.473431,"median":16.623403,"eighty":19.071317,"marketCap":587835825},{"date":"2022-03-04","current":15.752989,"twenty":13.473431,"median":16.581293,"eighty":19.071317,"marketCap":572699932},{"date":"2022-03-11","current":21.852,"twenty":13.473431,"median":16.518459,"eighty":19.074144,"marketCap":560591218},{"date":"2022-03-18","current":21.160617,"twenty":13.473431,"median":16.518459,"eighty":19.108887,"marketCap":542854476},{"date":"2022-03-25","current":21.761834,"twenty":13.473431,"median":16.518459,"eighty":19.134474,"marketCap":558278079},{"date":"2022-04-01","current":21.468089,"twenty":13.473431,"median":16.518459,"eighty":19.14566,"marketCap":550742346},{"date":"2022-04-08","current":21.23474,"twenty":13.473431,"median":16.518459,"eighty":19.155644,"marketCap":544756016},{"date":"2022-04-14","current":21.275919,"twenty":13.473431,"median":16.518459,"eighty":19.15979,"marketCap":545812427},{"date":"2022-04-22","current":21.130812,"twenty":13.473431,"median":16.518459,"eighty":19.17326,"marketCap":542089850},{"date":"2022-04-29","current":19.624424,"twenty":13.473431,"median":16.518459,"eighty":19.173399,"marketCap":503444980},{"date":"2022-05-06","current":20.112759,"twenty":13.473431,"median":16.518459,"eighty":19.181103,"marketCap":515972713},{"date":"2022-05-13","current":25.330595,"twenty":13.473431,"median":16.518459,"eighty":19.190991,"marketCap":495871718},{"date":"2022-05-20","current":23.902449,"twenty":13.473431,"median":16.518459,"eighty":19.215452,"marketCap":467914349},{"date":"2022-05-27","current":24.649846,"twenty":13.473431,"median":16.518459,"eighty":19.233787,"marketCap":482545395},{"date":"2022-06-03","current":24.912884,"twenty":13.473431,"median":16.518459,"eighty":19.240289,"marketCap":487694615},{"date":"2022-06-10","current":24.094946,"twenty":13.473431,"median":16.518459,"eighty":19.260204,"marketCap":471682657},{"date":"2022-06-17","current":22.405021,"twenty":13.473431,"median":16.518459,"eighty":19.260204,"marketCap":438600682},{"date":"2022-06-24","current":23.648142,"twenty":13.473006,"median":16.51516,"eighty":19.260614,"marketCap":462936037},{"date":"2022-07-01","current":23.824702,"twenty":13.473006,"median":16.51516,"eighty":19.272689,"marketCap":466392363},{"date":"2022-07-08","current":23.813892,"twenty":13.473006,"median":16.51516,"eighty":19.278159,"marketCap":466180751},{"date":"2022-07-15","current":24.062516,"twenty":13.473006,"median":16.51516,"eighty":19.278159,"marketCap":471047822},{"date":"2022-07-22","current":24.923694,"twenty":13.473006,"median":16.51516,"eighty":19.278159,"marketCap":487906227},{"date":"2022-07-29","current":25.655154,"twenty":13.473006,"median":16.51516,"eighty":19.278159,"marketCap":502225291},{"date":"2022-08-05","current":26.646048,"twenty":13.473006,"median":16.51516,"eighty":19.278159,"marketCap":521623037},{"date":"2022-08-12","current":31.839043,"twenty":13.473006,"median":16.51516,"eighty":19.281889,"marketCap":540244874},{"date":"2022-08-19","current":31.535576,"twenty":13.473006,"median":16.51516,"eighty":19.308689,"marketCap":535095654},{"date":"2022-08-26","current":29.56205,"twenty":13.473006,"median":16.51516,"eighty":19.331788,"marketCap":501608858},{"date":"2022-09-02","current":27.894298,"twenty":13.473006,"median":16.51516,"eighty":19.350096,"marketCap":473310441},{"date":"2022-09-09","current":27.648918,"twenty":13.473006,"median":16.51516,"eighty":19.384475,"marketCap":469146833},{"date":"2022-09-16","current":27.553261,"twenty":13.473006,"median":16.51516,"eighty":19.407327,"marketCap":467523732},{"date":"2022-09-23","current":27.237178,"twenty":13.473006,"median":16.51516,"eighty":19.420234,"marketCap":462160441},{"date":"2022-09-30","current":27.054183,"twenty":13.473006,"median":16.51516,"eighty":19.472715,"marketCap":459055378},{"date":"2022-10-07","current":26.729782,"twenty":13.473006,"median":16.51516,"eighty":19.49597,"marketCap":453550947},{"date":"2022-10-14","current":26.754736,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":453974365},{"date":"2022-10-21","current":28.626279,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":485730694},{"date":"2022-10-28","current":29.250126,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":496316137},{"date":"2022-11-04","current":29.033859,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":492646517},{"date":"2022-11-11","current":28.8675,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":489823732},{"date":"2022-11-18","current":22.303061,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":485448415},{"date":"2022-11-25","current":22.757701,"twenty":13.473006,"median":16.51516,"eighty":19.501365,"marketCap":495344123},{"date":"2022-12-02","current":22.874474,"twenty":13.473006,"median":16.51516,"eighty":19.547891,"marketCap":497885797},{"date":"2022-12-09","current":22.553349,"twenty":13.473006,"median":16.51516,"eighty":19.593234,"marketCap":490896192},{"date":"2022-12-16","current":21.700259,"twenty":13.473006,"median":16.51516,"eighty":19.634615,"marketCap":472327848},{"date":"2022-12-23","current":22.417114,"twenty":13.473006,"median":16.51516,"eighty":19.687799,"marketCap":487930905},{"date":"2022-12-30","current":22.206275,"twenty":13.473006,"median":16.51516,"eighty":19.787111,"marketCap":483341771},{"date":"2023-01-06","current":22.926373,"twenty":13.494691,"median":16.573277,"eighty":19.816189,"marketCap":499015430},{"date":"2023-01-13","current":23.305884,"twenty":13.538867,"median":16.623377,"eighty":19.868199,"marketCap":507275872},{"date":"2023-01-20","current":23.046389,"twenty":13.561656,"median":16.639515,"eighty":19.910798,"marketCap":501627707},{"date":"2023-01-27","current":23.688639,"twenty":13.581928,"median":16.798794,"eighty":19.973923,"marketCap":515606917},{"date":"2023-02-03","current":24.684451,"twenty":13.618976,"median":16.847828,"eighty":20.049274,"marketCap":537281752},{"date":"2023-02-10","current":23.82163,"twenty":13.663553,"median":16.901937,"eighty":20.161767,"marketCap":518501602},{"date":"2023-02-17","current":24.872584,"twenty":13.698901,"median":17.019398,"eighty":20.243446,"marketCap":541376672},{"date":"2023-02-24","current":24.836904,"twenty":13.712844,"median":17.12639,"eighty":20.273838,"marketCap":540600049},{"date":"2023-03-03","current":23.769731,"twenty":13.735116,"median":17.176488,"eighty":20.322102,"marketCap":517371968},{"date":"2023-03-10","current":23.902722,"twenty":13.747506,"median":17.224584,"eighty":20.42079,"marketCap":520266653},{"date":"2023-03-17","current":25.438811,"twenty":13.769629,"median":17.312761,"eighty":20.533282,"marketCap":526557952},{"date":"2023-03-24","current":24.162263,"twenty":13.784322,"median":17.449002,"eighty":20.731453,"marketCap":500134677},{"date":"2023-03-31","current":24.605983,"twenty":13.793216,"median":17.568531,"eighty":21.126106,"marketCap":509319238},{"date":"2023-04-06","current":24.117891,"twenty":13.823314,"median":17.639418,"eighty":21.154029,"marketCap":499216221},{"date":"2023-04-14","current":24.210048,"twenty":13.881139,"median":17.758725,"eighty":21.239132,"marketCap":501123783},{"date":"2023-04-21","current":24.356817,"twenty":13.909758,"median":17.806753,"eighty":21.314353,"marketCap":504161753},{"date":"2023-04-28","current":23.455724,"twenty":13.978161,"median":17.847203,"eighty":21.468089,"marketCap":485510029},{"date":"2023-05-05","current":23.26117,"twenty":14.016436,"median":17.919348,"eighty":21.652254,"marketCap":481482953},{"date":"2023-05-12","current":24.595743,"twenty":14.041326,"median":17.988502,"eighty":21.761834,"marketCap":509107286},{"date":"2023-05-19","current":19.954555,"twenty":14.041326,"median":18.05425,"eighty":21.761834,"marketCap":532028335},{"date":"2023-05-26","current":20.119117,"twenty":14.041326,"median":18.092327,"eighty":21.761834,"marketCap":536415906},{"date":"2023-06-02","current":20.246521,"twenty":14.041326,"median":18.135413,"eighty":21.761834,"marketCap":539812735},{"date":"2023-06-09","current":21.807212,"twenty":14.040743,"median":18.212568,"eighty":21.80723,"marketCap":581423890},{"date":"2023-06-16","current":21.079951,"twenty":14.040743,"median":18.212568,"eighty":21.80723,"marketCap":562033658},{"date":"2023-06-23","current":19.776721,"twenty":14.040161,"median":18.20856,"eighty":21.807248,"marketCap":527286928},{"date":"2023-06-30","current":19.370622,"twenty":14.038996,"median":18.191367,"eighty":21.807283,"marketCap":516459536},{"date":"2023-07-07","current":19.981097,"twenty":14.038996,"median":18.191367,"eighty":21.807283,"marketCap":532736008},{"date":"2023-07-14","current":20.387195,"twenty":14.038996,"median":18.191367,"eighty":21.807283,"marketCap":543563400},{"date":"2023-07-21","current":20.437626,"twenty":14.038996,"median":18.191367,"eighty":21.807283,"marketCap":544907979},{"date":"2023-07-28","current":20.238558,"twenty":14.038996,"median":18.220673,"eighty":21.807283,"marketCap":539600433},{"date":"2023-08-04","current":21.13569,"twenty":14.038996,"median":18.220673,"eighty":21.807283,"marketCap":563519771},{"date":"2023-08-11","current":21.093222,"twenty":14.038996,"median":18.220673,"eighty":21.807283,"marketCap":562387494},{"date":"2023-08-18","current":20.948396,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":533786081},{"date":"2023-08-25","current":20.262156,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":516299985},{"date":"2023-09-01","current":20.795589,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":529892416},{"date":"2023-09-08","current":19.887085,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":506742807},{"date":"2023-09-15","current":21.242896,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":541290235},{"date":"2023-09-22","current":20.615,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":525290812},{"date":"2023-09-29","current":20.120462,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":512689496},{"date":"2023-10-06","current":20.103792,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":512264732},{"date":"2023-10-13","current":20.601108,"twenty":14.038996,"median":18.220673,"eighty":21.807301,"marketCap":524936842},{"date":"2023-10-20","current":20.517759,"twenty":14.038996,"median":18.253441,"eighty":21.807301,"marketCap":522813025},{"date":"2023-10-27","current":20.281604,"twenty":14.037157,"median":18.216576,"eighty":21.808599,"marketCap":516795543},{"date":"2023-11-03","current":21.276236,"twenty":14.037157,"median":18.216576,"eighty":21.808599,"marketCap":542139762},{"date":"2023-11-10","current":21.879127,"twenty":14.037157,"median":18.216576,"eighty":21.852171,"marketCap":557502041},{"date":"2023-11-17","current":23.82835,"twenty":14.037157,"median":18.216576,"eighty":21.920006,"marketCap":561705699},{"date":"2023-11-24","current":23.19441,"twenty":14.037157,"median":18.216576,"eighty":22.052115,"marketCap":546761820},{"date":"2023-12-01","current":22.449304,"twenty":14.037157,"median":18.216576,"eighty":22.148353,"marketCap":529197451},{"date":"2023-12-08","current":23.521896,"twenty":14.037785,"median":18.219582,"eighty":22.256227,"marketCap":554481644},{"date":"2023-12-15","current":24.49534,"twenty":14.037785,"median":18.219582,"eighty":22.345753,"marketCap":577428642},{"date":"2023-12-22","current":24.122787,"twenty":14.037785,"median":18.291727,"eighty":22.417763,"marketCap":568646458},{"date":"2023-12-29","current":24.456282,"twenty":14.037157,"median":18.304753,"eighty":22.464685,"marketCap":576507929},{"date":"2024-01-05","current":24.071711,"twenty":14.03653,"median":18.336818,"eighty":22.501965,"marketCap":567442448},{"date":"2024-01-12","current":24.267001,"twenty":14.03653,"median":18.336818,"eighty":22.63398,"marketCap":572046013},{"date":"2024-01-19","current":24.888924,"twenty":14.035902,"median":18.336818,"eighty":22.708476,"marketCap":586706595},{"date":"2024-01-26","current":25.0752,"twenty":14.03653,"median":18.336818,"eighty":22.903182,"marketCap":591097688},{"date":"2024-02-02","current":23.74723,"twenty":14.03653,"median":18.336818,"eighty":23.017494,"marketCap":559793449},{"date":"2024-02-09","current":22.984098,"twenty":14.03653,"median":18.336818,"eighty":23.07688,"marketCap":541804135},{"date":"2024-02-16","current":23.557949,"twenty":14.03653,"median":18.336818,"eighty":23.1039,"marketCap":555331532},{"date":"2024-02-23","current":23.684136,"twenty":14.03653,"median":18.336818,"eighty":23.184764,"marketCap":558306143},{"date":"2024-03-01","current":23.233468,"twenty":14.037157,"median":18.352877,"eighty":23.214181,"marketCap":547682533},{"date":"2024-03-08","current":22.764772,"twenty":14.037157,"median":18.439023,"eighty":23.214181,"marketCap":536633978},{"date":"2024-03-15","current":22.551456,"twenty":14.037157,"median":18.558425,"eighty":23.214181,"marketCap":531605469},{"date":"2024-03-22","current":16.448219,"twenty":14.037157,"median":18.439023,"eighty":23.214181,"marketCap":568433985},{"date":"2024-03-28","current":16.776117,"twenty":14.037157,"median":18.366878,"eighty":23.214181,"marketCap":579765837},{"date":"2024-04-05","current":16.933919,"twenty":14.03653,"median":18.312769,"eighty":23.215053,"marketCap":585219290},{"date":"2024-04-12","current":16.343701,"twenty":14.03653,"median":18.219582,"eighty":23.215053,"marketCap":564821958},{"date":"2024-04-19","current":16.488876,"twenty":14.03653,"median":18.135413,"eighty":23.215053,"marketCap":569839081},{"date":"2024-04-26","current":17.099041,"twenty":14.037157,"median":18.084311,"eighty":23.214181,"marketCap":590925763},{"date":"2024-05-03","current":17.266012,"twenty":14.037157,"median":18.032206,"eighty":23.214181,"marketCap":596696105},{"date":"2024-05-10","current":17.696838,"twenty":14.037157,"median":17.919981,"eighty":23.214181,"marketCap":611585012},{"date":"2024-05-17","current":17.998832,"twenty":14.037157,"median":17.853848,"eighty":23.214181,"marketCap":580444344},{"date":"2024-05-24","current":16.495628,"twenty":14.037157,"median":17.772885,"eighty":23.214181,"marketCap":531967518},{"date":"2024-05-31","current":16.392187,"twenty":14.037157,"median":17.690709,"eighty":23.214181,"marketCap":528631631},{"date":"2024-06-07","current":16.317357,"twenty":14.037157,"median":17.66547,"eighty":23.214181,"marketCap":526218436},{"date":"2024-06-14","current":16.337165,"twenty":14.037157,"median":17.55124,"eighty":23.214181,"marketCap":526857223},{"date":"2024-06-21","current":16.167697,"twenty":14.03653,"median":17.342282,"eighty":23.215053,"marketCap":521392046},{"date":"2024-06-28","current":16.535244,"twenty":14.03653,"median":17.259327,"eighty":23.215053,"marketCap":533245092},{"date":"2024-07-05","current":15.494226,"twenty":14.03653,"median":17.22258,"eighty":23.215053,"marketCap":499673292},{"date":"2024-07-12","current":16.354772,"twenty":14.03653,"median":17.175091,"eighty":23.215053,"marketCap":527425033},{"date":"2024-07-19","current":16.526441,"twenty":14.03653,"median":17.134494,"eighty":23.215053,"marketCap":532961186},{"date":"2024-07-26","current":17.14709,"twenty":14.03653,"median":17.117631,"eighty":23.215053,"marketCap":552976509},{"date":"2024-08-02","current":16.376781,"twenty":14.03653,"median":17.086593,"eighty":23.215053,"marketCap":528134797},{"date":"2024-08-09","current":15.753054,"twenty":14.03653,"median":16.988788,"eighty":23.215053,"marketCap":517062491},{"date":"2024-08-16","current":15.836972,"twenty":14.03653,"median":16.941976,"eighty":23.215053,"marketCap":519816916},{"date":"2024-08-23","current":16.083579,"twenty":14.03653,"median":16.901544,"eighty":23.215053,"marketCap":527911319},{"date":"2024-08-30","current":16.93589,"twenty":14.03653,"median":16.875207,"eighty":23.215053,"marketCap":555886714},{"date":"2024-09-06","current":15.999213,"twenty":14.03653,"median":16.849887,"eighty":23.215053,"marketCap":525142181},{"date":"2024-09-13","current":16.589774,"twenty":14.03653,"median":16.815688,"eighty":23.215053,"marketCap":544526148},{"date":"2024-09-20","current":16.061947,"twenty":14.03653,"median":16.774068,"eighty":23.215053,"marketCap":527201284},{"date":"2024-09-27","current":16.100885,"twenty":14.03653,"median":16.662787,"eighty":23.215053,"marketCap":528479348},{"date":"2024-10-04","current":15.553589,"twenty":14.03653,"median":16.615625,"eighty":23.215053,"marketCap":510515452},{"date":"2024-10-11","current":15.380531,"twenty":14.03653,"median":16.595847,"eighty":23.215053,"marketCap":504835169},{"date":"2024-10-18","current":16.079253,"twenty":14.03653,"median":16.579362,"eighty":23.215053,"marketCap":527769312},{"date":"2024-10-25","current":16.157129,"twenty":14.03653,"median":16.533305,"eighty":23.215053,"marketCap":530325440},{"date":"2024-11-01","current":15.713668,"twenty":14.03653,"median":16.509506,"eighty":23.215053,"marketCap":515769714},{"date":"2024-11-08","current":16.006021,"twenty":14.03653,"median":16.488489,"eighty":23.215053,"marketCap":542396042},{"date":"2024-11-15","current":15.934781,"twenty":14.03653,"median":16.428941,"eighty":23.215053,"marketCap":539981921},{"date":"2024-11-22","current":16.48375,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":558584849},{"date":"2024-11-29","current":16.703757,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":566040220},{"date":"2024-12-06","current":18.551815,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":628665343},{"date":"2024-12-13","current":19.482129,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":660190914},{"date":"2024-12-20","current":19.580609,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":663528081},{"date":"2024-12-27","current":20.366347,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":690154408},{"date":"2025-01-03","current":20.137959,"twenty":14.03653,"median":16.40645,"eighty":23.215053,"marketCap":682415022},{"date":"2025-01-10","current":19.961954,"twenty":14.035902,"median":16.405392,"eighty":23.215926,"marketCap":676450725},{"date":"2025-01-17","current":20.42292,"twenty":14.035902,"median":16.405392,"eighty":23.215926,"marketCap":692071504},{"date":"2025-01-24","current":20.531876,"twenty":14.035902,"median":16.405392,"eighty":23.215926,"marketCap":695763688},{"date":"2025-01-31","current":20.150531,"twenty":14.035902,"median":16.422999,"eighty":23.215926,"marketCap":682841044},{"date":"2025-02-07","current":20.542353,"twenty":14.035902,"median":16.452321,"eighty":23.215926,"marketCap":696118706},{"date":"2025-02-14","current":20.823123,"twenty":14.035902,"median":16.488876,"eighty":23.215926,"marketCap":705633180},{"date":"2025-02-21","current":20.747692,"twenty":14.035902,"median":16.517637,"eighty":23.215926,"marketCap":703077053},{"date":"2025-02-28","current":21.317615,"twenty":14.038996,"median":16.585447,"eighty":23.215926,"marketCap":722390015},{"date":"2025-03-07","current":18.635627,"twenty":14.055681,"median":16.622977,"eighty":23.216798,"marketCap":631505484},{"date":"2025-03-14","current":15.243669,"twenty":14.075231,"median":16.691997,"eighty":23.216798,"marketCap":632002509},{"date":"2025-03-21","current":15.400014,"twenty":14.096495,"median":16.691997,"eighty":23.216798,"marketCap":638484599},{"date":"2025-03-28","current":15.136398,"twenty":14.197457,"median":16.691997,"eighty":23.216798,"marketCap":627555069},{"date":"2025-04-04","current":14.200819,"twenty":14.246365,"median":16.691997,"eighty":23.216798,"marketCap":588765951},{"date":"2025-04-11","current":14.479942,"twenty":14.250049,"median":16.683896,"eighty":23.215926,"marketCap":600338395},{"date":"2025-04-17","current":14.342103,"twenty":14.290517,"median":16.683896,"eighty":23.215926,"marketCap":594623608},{"date":"2025-04-25","current":14.521294,"twenty":14.281613,"median":16.691997,"eighty":23.216798,"marketCap":602052831},{"date":"2025-05-02","current":14.799891,"twenty":14.306843,"median":16.691997,"eighty":23.216798,"marketCap":613603485},{"date":"2025-05-09","current":13.625186,"twenty":14.321428,"median":16.691997,"eighty":23.216798,"marketCap":579097665},{"date":"2025-05-16","current":14.658806,"twenty":14.342103,"median":16.691997,"eighty":23.216798,"marketCap":623028571},{"date":"2025-05-23","current":14.088732,"twenty":14.353936,"median":16.691997,"eighty":23.216798,"marketCap":598799285},{"date":"2025-05-30","current":14.483916,"twenty":14.3847,"median":16.691997,"eighty":23.216798,"marketCap":615595398},{"date":"2025-06-06","current":14.5495,"twenty":14.396597,"median":16.691997,"eighty":23.216798,"marketCap":618382838},{"date":"2025-06-13","current":16.074742,"twenty":14.401516,"median":16.701928,"eighty":23.216798,"marketCap":683208686},{"date":"2025-06-20","current":15.627427,"twenty":14.445304,"median":16.703757,"eighty":23.220132,"marketCap":664196916},{"date":"2025-06-27","current":16.363983,"twenty":14.469947,"median":16.703757,"eighty":23.220132,"marketCap":695502011},{"date":"2025-07-03","current":18.212099,"twenty":14.490443,"median":16.750259,"eighty":23.220132,"marketCap":774050640},{"date":"2025-07-11","current":17.633617,"twenty":14.515613,"median":16.801551,"eighty":23.220132,"marketCap":749463990},{"date":"2025-07-18","current":18.538336,"twenty":14.544479,"median":16.851946,"eighty":23.220132,"marketCap":787916367},{"date":"2025-07-25","current":17.616801,"twenty":14.586038,"median":16.890335,"eighty":23.220132,"marketCap":748749262},{"date":"2025-08-01","current":16.219363,"twenty":14.607401,"median":16.90115,"eighty":23.220132,"marketCap":689355348},{"date":"2025-08-08","current":16.765894,"twenty":14.66492,"median":16.90115,"eighty":23.220132,"marketCap":712584015},{"date":"2025-08-15","current":17.845879,"twenty":14.706442,"median":16.962216,"eighty":23.220132,"marketCap":741978119},{"date":"2025-08-22","current":18.071145,"twenty":14.746918,"median":17.013844,"eighty":23.220132,"marketCap":751344002},{"date":"2025-08-29","current":18.320485,"twenty":14.798244,"median":17.105225,"eighty":23.220132,"marketCap":761710819},{"date":"2025-09-05","current":18.703953,"twenty":14.854363,"median":17.135366,"eighty":23.223466,"marketCap":777654269},{"date":"2025-09-12","current":19.476048,"twenty":14.891323,"median":17.188907,"eighty":23.220132,"marketCap":809755654},{"date":"2025-09-19","current":19.850918,"twenty":14.964442,"median":17.31656,"eighty":23.220132,"marketCap":825341627},{"date":"2025-09-26","current":19.128691,"twenty":14.98451,"median":17.484766,"eighty":23.220132,"marketCap":795313605},{"date":"2025-10-03","current":19.837162,"twenty":15.058133,"median":17.624682,"eighty":23.220132,"marketCap":824769665},{"date":"2025-10-10","current":19.324724,"twenty":15.112543,"median":17.678285,"eighty":23.220132,"marketCap":803464069},{"date":"2025-10-17","current":18.872473,"twenty":15.134674,"median":17.774874,"eighty":23.220132,"marketCap":784660807},{"date":"2025-10-24","current":19.434778,"twenty":15.172357,"median":17.803462,"eighty":23.220132,"marketCap":808039767},{"date":"2025-10-31","current":18.146807,"twenty":15.230807,"median":17.895391,"eighty":23.220132,"marketCap":754489795},{"date":"2025-11-07","current":18.406465,"twenty":15.248301,"median":18.024716,"eighty":23.220132,"marketCap":765285584},{"date":"2025-11-14","current":17.340382,"twenty":15.276092,"median":18.071145,"eighty":23.220132,"marketCap":672997554},{"date":"2025-11-21","current":17.211388,"twenty":15.304509,"median":18.071145,"eighty":23.220132,"marketCap":667991196},{"date":"2025-11-28","current":17.2722,"twenty":15.330046,"median":18.071145,"eighty":23.220132,"marketCap":670351336},{"date":"2025-12-05","current":17.554142,"twenty":15.356211,"median":18.071145,"eighty":23.220132,"marketCap":681293804},{"date":"2025-12-12","current":19.424544,"twenty":15.38986,"median":18.237806,"eighty":23.220132,"marketCap":753885995},{"date":"2025-12-19","current":19.42823,"twenty":15.399348,"median":18.320485,"eighty":23.220132,"marketCap":754029034},{"date":"2025-12-26","current":20.226146,"twenty":15.424088,"median":18.406465,"eighty":23.220132,"marketCap":784996934},{"date":"2026-01-02","current":19.673317,"twenty":15.473656,"median":18.458052,"eighty":23.220132,"marketCap":763541114},{"date":"2026-01-09","current":21.591631,"twenty":15.524678,"median":18.551815,"eighty":23.220132,"marketCap":837992809},{"date":"2026-01-16","current":21.962026,"twenty":15.558194,"median":18.635627,"eighty":23.220132,"marketCap":852368209},{"date":"2026-01-23","current":22.538811,"twenty":15.567419,"median":18.731467,"eighty":23.220132,"marketCap":874753781},{"date":"2026-01-30","current":23.09901,"twenty":15.587228,"median":18.870753,"eighty":23.220132,"marketCap":896495679},{"date":"2026-02-06","current":24.661671,"twenty":15.668368,"median":18.962494,"eighty":23.278304,"marketCap":957144130},{"date":"2026-02-13","current":22.367434,"twenty":15.704578,"median":19.039273,"eighty":23.33946,"marketCap":868102477},{"date":"2026-02-20","current":23.412279,"twenty":15.720164,"median":19.128691,"eighty":23.396272,"marketCap":908653977},{"date":"2026-02-27","current":24.606389,"twenty":15.720164,"median":19.192316,"eighty":23.414142,"marketCap":954998548},{"date":"2026-03-06","current":24.96757,"twenty":15.724879,"median":19.301933,"eighty":23.449443,"marketCap":969016350},{"date":"2026-03-13","current":24.427641,"twenty":15.724879,"median":19.364792,"eighty":23.476787,"marketCap":948061166},{"date":"2026-03-20","current":28.952783,"twenty":15.740808,"median":19.424544,"eighty":23.523098,"marketCap":957873862},{"date":"2026-03-27","current":29.5418,"twenty":15.765308,"median":19.434778,"eighty":23.579915,"marketCap":977360899},{"date":"2026-04-02","current":30.72633,"twenty":15.785759,"median":19.476792,"eighty":23.653908,"marketCap":1016549905},{"date":"2026-04-10","current":30.960204,"twenty":15.807143,"median":19.601578,"eighty":23.68894,"marketCap":1024287405},{"date":"2026-04-17","current":30.475132,"twenty":15.807143,"median":19.673317,"eighty":23.739424,"marketCap":1008239256},{"date":"2026-04-24","current":30.29756,"twenty":15.834341,"median":19.69585,"eighty":23.770038,"marketCap":1002364488},{"date":"2026-05-01","current":30.282402,"twenty":15.843482,"median":19.776721,"eighty":23.798541,"marketCap":1001862983},{"date":"2026-05-08","current":29.764847,"twenty":15.861468,"median":19.819473,"eighty":23.822244,"marketCap":984740182},{"date":"2026-05-15","current":30.158968,"twenty":15.882731,"median":19.850918,"eighty":23.896048,"marketCap":997779303},{"date":"2026-05-22","current":28.746771,"twenty":15.896909,"median":19.892641,"eighty":23.94589,"marketCap":922771357},{"date":"2026-05-29","current":29.46784,"twenty":15.912166,"median":19.934679,"eighty":23.981448,"marketCap":945917676},{"date":"2026-06-05","current":29.253529,"twenty":15.92301,"median":19.962517,"eighty":24.001407,"marketCap":939038274},{"date":"2026-06-12","current":29.019126,"twenty":15.950379,"median":20.021157,"eighty":24.033855,"marketCap":931513929},{"date":"2026-06-18","current":28.90304,"twenty":15.996207,"median":20.076009,"eighty":24.061834,"marketCap":927787587},{"date":"2026-06-26","current":27.619403,"twenty":16.012086,"median":20.114883,"eighty":24.100028,"marketCap":886582839},{"date":"2026-07-02","current":27.539036,"twenty":16.020031,"median":20.128797,"eighty":24.133116,"marketCap":884003064},{"date":"2026-07-10","current":27.900687,"twenty":16.028611,"median":20.179855,"eighty":24.208,"marketCap":895612054},{"date":"2026-07-17","current":27.253288,"twenty":16.04093,"median":20.216893,"eighty":24.26743,"marketCap":874830529},{"date":"2026-07-24","current":27.230963,"twenty":16.047119,"median":20.235064,"eighty":24.325984,"marketCap":874113925},{"date":"2026-07-31","current":27.123808,"twenty":16.062812,"median":20.249175,"eighty":24.370489,"marketCap":870674224},{"date":"2026-08-07","current":30.749245,"twenty":16.076546,"median":20.27049,"eighty":24.410141,"marketCap":987050762},{"date":"2026-08-14","current":30.762639,"twenty":16.104249,"median":20.299298,"eighty":24.456949,"marketCap":987480725},{"date":"2026-08-21","current":25.12209,"twenty":16.136886,"median":20.323278,"eighty":24.501949,"marketCap":1075476657},{"date":"2026-08-28","current":25.575491,"twenty":16.151953,"median":20.373288,"eighty":24.555738,"marketCap":1094886759},{"date":"2026-09-04","current":24.120273,"twenty":16.173973,"median":20.403121,"eighty":24.591441,"marketCap":1032588894},{"date":"2026-09-11","current":24.665355,"twenty":16.191963,"median":20.42292,"eighty":24.615168,"marketCap":1055923833},{"date":"2026-09-18","current":25.350457,"twenty":16.210543,"median":20.459415,"eighty":24.663881,"marketCap":1085253069},{"date":"2026-09-25","current":24.020258,"twenty":16.236051,"median":20.503982,"eighty":24.69029,"marketCap":1028307254},{"date":"2026-10-02","current":25.023742,"twenty":16.247984,"median":20.549104,"eighty":24.72103,"marketCap":1071266378},{"date":"2026-10-08","current":24.617014,"twenty":16.265051,"median":20.567496,"eighty":24.775273,"marketCap":1053854374}],"updateTime":1791573654339},"$inf$@#url:\"https://stock-news.skytigris.cn/v3/notice/important/events/list\",params:#symbol:\"NPK\",pageSize:20,pageCount:6,market:\"us\",,,undefined,":[{"items":[{"cdn_pdf":false,"hasAttachments":true,"id":"9080975","market":"us","labels":[],"media":"sec.gov","original_id":"AN110465920018031-NPK","pdf_url":null,"pub_time":1581436800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NPK","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000110465920018031/0001104659-20-018031-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"SCHEDULE 13G/A","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000110465920018031/tv01376-nationalprestoindust.htm","primary":true,"translateUrl":null,"linkName":"tv01376-nationalprestoindust.htm","type":"SC 13G/A","id":"NTFILE9D4fca19ttnYoLvm","market":"us","size":12164}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-12 00:00","pubTimestamp":1581436800,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9050071","market":"us","labels":[],"media":"sec.gov","original_id":"AN83423720002181-NPK","pdf_url":null,"pub_time":1580745600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NPK","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000083423720002181/0000834237-20-002181-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000083423720002181/us6372151042_020320.txt","primary":true,"translateUrl":null,"linkName":"us6372151042_020320.txt","type":"SC 13G/A","id":"NTFILE8JAuz6q8UJy2bkrX","market":"us","size":11587}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-04 00:00","pubTimestamp":1580745600,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9030352","market":"us","labels":[],"media":"sec.gov","original_id":"AN156276220000024-NPK","pdf_url":null,"pub_time":1580140800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Quarterly report [Sections 13 or 15(d)]","symbol":"NPK","title":"Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/0001562762-20-000024-index.htm","us_notice_code":"Form 10-Q","us_title_en":"Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929x10q.htm","primary":true,"translateUrl":null,"linkName":"npk-20190929x10q.htm","type":"10-Q","id":"NTFILECotzEr9nYbeyvNYW","market":"us","size":1226230},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929xex31_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190929xex31_1.htm","type":"EX-31.1","id":"NTFILECwnhKjqdQ8qUi1Kh","market":"us","size":15431},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929xex31_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190929xex31_2.htm","type":"EX-31.2","id":"NTFILEEsdfb4zEe1Vf4253","market":"us","size":15638},{"description":"EX-32.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929xex32_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190929xex32_1.htm","type":"EX-32.1","id":"NTFILE94V9eucaSMPrCbgg","market":"us","size":8737},{"description":"EX-32.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929xex32_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190929xex32_2.htm","type":"EX-32.2","id":"NTFILEAwy5tNtYqkS6Sp6z","market":"us","size":9047},{"description":"","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929.xml","primary":false,"translateUrl":null,"linkName":"npk-20190929.xml","type":"EX-101.INS","id":"NTFILE9xxoyuqs2ZNFWCJc","market":"us","size":1092381},{"description":"","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929.xsd","primary":false,"translateUrl":null,"linkName":"npk-20190929.xsd","type":"EX-101.SCH","id":"NTFILE5WerM3M9wXwfVkpy","market":"us","size":29334},{"description":"","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929_cal.xml","primary":false,"translateUrl":null,"linkName":"npk-20190929_cal.xml","type":"EX-101.CAL","id":"NTFILEEKYfpxASqoDre6T1","market":"us","size":71423},{"description":"","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929_def.xml","primary":false,"translateUrl":null,"linkName":"npk-20190929_def.xml","type":"EX-101.DEF","id":"NTFILE4TY5KUX3ivwUW7KB","market":"us","size":99968},{"description":"","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929_lab.xml","primary":false,"translateUrl":null,"linkName":"npk-20190929_lab.xml","type":"EX-101.LAB","id":"NTFILEHKdpL9wK5UwrtJQK","market":"us","size":266036},{"description":"","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276220000024/npk-20190929_pre.xml","primary":false,"translateUrl":null,"linkName":"npk-20190929_pre.xml","type":"EX-101.PRE","id":"NTFILE2gVYfteGGkWLBZcm","market":"us","size":236030}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2020-01-28 00:00","pubTimestamp":1580140800,"title_zh":"Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9022341","market":"us","labels":[],"media":"sec.gov","original_id":"AN90630420000042-NPK","pdf_url":null,"pub_time":1579708800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NPK","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000090630420000042/0000906304-20-000042-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000090630420000042/npk19.txt","primary":true,"translateUrl":null,"linkName":"npk19.txt","type":"SC 13G/A","id":"NTFILE6WwoAE8AVv3mYNT2","market":"us","size":6359}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-01-23 00:00","pubTimestamp":1579708800,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8782334","market":"us","labels":[],"media":"sec.gov","original_id":"AN156276219000316-NPK","pdf_url":null,"pub_time":1574352000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Quarterly report [Sections 13 or 15(d)]","symbol":"NPK","title":"Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/0001562762-19-000316-index.htm","us_notice_code":"Form 10-Q","us_title_en":"Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630x10q.htm","primary":true,"translateUrl":null,"linkName":"npk-20190630x10q.htm","type":"10-Q","id":"NTFILE8eFDvEXsqRhB4Pjq","market":"us","size":1100080},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630xex31_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190630xex31_1.htm","type":"EX-31.1","id":"NTFILE2NVFGDDTqoWRVDAa","market":"us","size":15367},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630xex31_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190630xex31_2.htm","type":"EX-31.2","id":"NTFILEFj76FqeGMJVcEz1B","market":"us","size":15574},{"description":"EX-32.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630xex32_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190630xex32_1.htm","type":"EX-32.1","id":"NTFILEDkVRnZmVumXTucg3","market":"us","size":8937},{"description":"EX-32.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630xex32_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190630xex32_2.htm","type":"EX-32.2","id":"NTFILECmcqvLj1MmtmVpyP","market":"us","size":8978},{"description":"EX-101.INS","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630.xml","primary":false,"translateUrl":null,"linkName":"npk-20190630.xml","type":"EX-101.INS","id":"NTFILECsBwaP16T3BmXa1B","market":"us","size":843080},{"description":"EX-101.SCH","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630.xsd","primary":false,"translateUrl":null,"linkName":"npk-20190630.xsd","type":"EX-101.SCH","id":"NTFILE4T6yfmSViKLFWcSw","market":"us","size":26454},{"description":"EX-101.CAL","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630_cal.xml","primary":false,"translateUrl":null,"linkName":"npk-20190630_cal.xml","type":"EX-101.CAL","id":"NTFILE2dr7LXNcRLebwg2N","market":"us","size":58161},{"description":"EX-101.DEF","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630_def.xml","primary":false,"translateUrl":null,"linkName":"npk-20190630_def.xml","type":"EX-101.DEF","id":"NTFILEHYBKfWguLNCAANkZ","market":"us","size":77815},{"description":"EX-101.LAB","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630_lab.xml","primary":false,"translateUrl":null,"linkName":"npk-20190630_lab.xml","type":"EX-101.LAB","id":"NTFILEGivnWXxnQzsMSSuR","market":"us","size":224046},{"description":"EX-101.PRE","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000316/npk-20190630_pre.xml","primary":false,"translateUrl":null,"linkName":"npk-20190630_pre.xml","type":"EX-101.PRE","id":"NTFILE3WSRzc7PnWJ1tSH3","market":"us","size":199608}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2019-11-22 00:00","pubTimestamp":1574352000,"title_zh":"Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8767072","market":"us","labels":[],"media":"sec.gov","original_id":"AN156276219000308-NPK","pdf_url":null,"pub_time":1574006400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Quarterly report [Sections 13 or 15(d)]","symbol":"NPK","title":"[Amend] Quarterly report [Sections 13 or 15(d)]","titleType":"[Rev.]Quaterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/0001562762-19-000308-index.htm","us_notice_code":"Form 10-Q/A","us_title_en":"[Amend] Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q/A","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331x10qa.htm","primary":true,"translateUrl":null,"linkName":"npk-20190331x10qa.htm","type":"10-Q/A","id":"NTFILEB6h92LWsBXRYeNfC","market":"us","size":750997},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331xex31_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex31_1.htm","type":"EX-31.1","id":"NTFILE5NxPr7qdicknFbFJ","market":"us","size":15364},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331xex31_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex31_2.htm","type":"EX-31.2","id":"NTFILE9WupLeSVC1N1m9cN","market":"us","size":15628},{"description":"EX-32.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331xex32_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex32_1.htm","type":"EX-32.1","id":"NTFILEN8DAzZYKJLWFiwza","market":"us","size":8869},{"description":"EX-32.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331xex32_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex32_2.htm","type":"EX-32.2","id":"NTFILE61eSvu3RbDBiwZzi","market":"us","size":9042},{"description":"EX-101.INS","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331.xml","primary":false,"translateUrl":null,"linkName":"npk-20190331.xml","type":"EX-101.INS","id":"NTFILE9CQ9R5X6g4eHwcaF","market":"us","size":561069},{"description":"EX-101.SCH","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331.xsd","primary":false,"translateUrl":null,"linkName":"npk-20190331.xsd","type":"EX-101.SCH","id":"NTFILEHnJ6d4r5HW835K22","market":"us","size":24552},{"description":"EX-101.CAL","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331_cal.xml","primary":false,"translateUrl":null,"linkName":"npk-20190331_cal.xml","type":"EX-101.CAL","id":"NTFILEEv8mToBKf2gc2R5U","market":"us","size":60736},{"description":"EX-101.DEF","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331_def.xml","primary":false,"translateUrl":null,"linkName":"npk-20190331_def.xml","type":"EX-101.DEF","id":"NTFILE64F6v8Lu8cBFu4Cc","market":"us","size":73500},{"description":"EX-101.LAB","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331_lab.xml","primary":false,"translateUrl":null,"linkName":"npk-20190331_lab.xml","type":"EX-101.LAB","id":"NTFILEwKQNLDTcuB7fiGic","market":"us","size":211991},{"description":"EX-101.PRE","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000308/npk-20190331_pre.xml","primary":false,"translateUrl":null,"linkName":"npk-20190331_pre.xml","type":"EX-101.PRE","id":"NTFILEGzynktquZLiHzcJM","market":"us","size":193812}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"[Rev.]Quaterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"[Rev.]Quaterly Report","pubTime":"2019-11-18 00:00","pubTimestamp":1574006400,"title_zh":"Amend] Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8764420","market":"us","labels":[],"media":"sec.gov","original_id":"AN156276219000302-NPK","pdf_url":null,"pub_time":1573747200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Annual report [Section 13 and 15(d), not S-K Item 405]","symbol":"NPK","title":"[Amend] Annual report [Section 13 and 15(d), not S-K Item 405]","titleType":"[Rev.]Annual Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/0001562762-19-000302-index.htm","us_notice_code":"Form 10-K/A","us_title_en":"[Amend] Annual report [Section 13 and 15(d), not S-K Item 405]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-K/A","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231x10ka.htm","primary":true,"translateUrl":null,"linkName":"npk-20181231x10ka.htm","type":"10-K/A","id":"NTFILEBgkdCJUETqT1c1Vr","market":"us","size":1465257},{"description":"EX-23.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231xex23_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20181231xex23_1.htm","type":"EX-23.1","id":"NTFILE7TNzBgEbQtnwpaDz","market":"us","size":3819},{"description":"EX-31.1","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231xex31_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20181231xex31_1.htm","type":"EX-31.1","id":"NTFILEFS2p9J4HPo44d9jZ","market":"us","size":14967},{"description":"EX-31.2","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231xex31_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20181231xex31_2.htm","type":"EX-31.2","id":"NTFILEEic72aDtLAiGUdg7","market":"us","size":15165},{"description":"EX-32.1","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231xex32_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20181231xex32_1.htm","type":"EX-32.1","id":"NTFILE5ontkyhkPcK1RVMR","market":"us","size":8192},{"description":"EX-32.2","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231xex32_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20181231xex32_2.htm","type":"EX-32.2","id":"NTFILE9LikZYoi9SWnMYH9","market":"us","size":8431},{"description":"EX-101.INS","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231.xml","primary":false,"translateUrl":null,"linkName":"npk-20181231.xml","type":"EX-101.INS","id":"NTFILE7TT8jcLgx8wskwJD","market":"us","size":1746248},{"description":"EX-101.SCH","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231.xsd","primary":false,"translateUrl":null,"linkName":"npk-20181231.xsd","type":"EX-101.SCH","id":"NTFILE2jvjaCssrsRd68mK","market":"us","size":45504},{"description":"EX-101.CAL","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231_cal.xml","primary":false,"translateUrl":null,"linkName":"npk-20181231_cal.xml","type":"EX-101.CAL","id":"NTFILE9LGHHpfsSuapRynA","market":"us","size":81470},{"description":"EX-101.DEF","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231_def.xml","primary":false,"translateUrl":null,"linkName":"npk-20181231_def.xml","type":"EX-101.DEF","id":"NTFILEEbHUf7vsXBBQ7Fu6","market":"us","size":148795},{"description":"EX-101.LAB","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231_lab.xml","primary":false,"translateUrl":null,"linkName":"npk-20181231_lab.xml","type":"EX-101.LAB","id":"NTFILE2TwYAeXXXKVyttxQ","market":"us","size":387752},{"description":"EX-101.PRE","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000156276219000302/npk-20181231_pre.xml","primary":false,"translateUrl":null,"linkName":"npk-20181231_pre.xml","type":"EX-101.PRE","id":"NTFILEEeb1hLPoUg3zBPmw","market":"us","size":357479}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"[Rev.]Annual Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"[Rev.]Annual Report","pubTime":"2019-11-15 00:00","pubTimestamp":1573747200,"title_zh":"Amend] Annual report [Section 13 and 15(d), not S-K Item 405","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8580146","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710119000944-NPK","pdf_url":null,"pub_time":1571760000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, item 8.01","symbol":"NPK","title":"Current report, item 8.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000944/0000897101-19-000944-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, item 8.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"FORM 8K DATED OCTOBER 17, 2019","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000944/presto192052_8k.htm","primary":true,"translateUrl":null,"linkName":"presto192052_8k.htm","type":"8-K","id":"NTFILEA47tLKKZQGQJt2Uz","market":"us","size":25766}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-10-23 00:00","pubTimestamp":1571760000,"title_zh":"Current report, item 8.01","summary_en":"Item 8.01: Other Events","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8485088","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710119000799-NPK","pdf_url":null,"pub_time":1566230400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 3.01 and 9.01","symbol":"NPK","title":"Current report, items 3.01 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000799/0000897101-19-000799-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 3.01 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"FORM 8K DATED AUGUST 15, 2019","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000799/presto191711_8k.htm","primary":true,"translateUrl":null,"linkName":"presto191711_8k.htm","type":"8-K","id":"NTFILEEcxKH17VbwcL6eKB","market":"us","size":25312},{"description":"PRESS RELEASE DATED AUGUST 20, 2019","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000799/presto191711_ex991.htm","primary":false,"translateUrl":null,"linkName":"presto191711_ex991.htm","type":"EX-99.1","id":"NTFILEfqxXdBs2b5UzmDX1","market":"us","size":6601}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-08-20 00:00","pubTimestamp":1566230400,"title_zh":"Current report, items 3.01 and 9.01","summary_en":"Item 3.01: Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8428521","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710119000698-NPK","pdf_url":null,"pub_time":1564070400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 8.01 and 9.01","symbol":"NPK","title":"Current report, items 8.01 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000698/0000897101-19-000698-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 8.01 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"FORM 8K DATED JULY 23, 2019","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000698/presto191567_8k.htm","primary":true,"translateUrl":null,"linkName":"presto191567_8k.htm","type":"8-K","id":"NTFILE5z4F1dgSnRGKooTB","market":"us","size":20865},{"description":"PRESS RELEASE DATED JULY 23, 2019","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000089710119000698/presto191567_ex991.htm","primary":false,"translateUrl":null,"linkName":"presto191567_ex991.htm","type":"EX-99.1","id":"NTFILEBFTKsehsNGdtWr9H","market":"us","size":5613}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-07-26 00:00","pubTimestamp":1564070400,"title_zh":"Current report, items 8.01 and 9.01","summary_en":"Item 8.01: Other Events;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8259504","market":"us","labels":[],"media":"sec.gov","original_id":"AN177849519000001-NPK","pdf_url":null,"pub_time":1559491200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Initial statement of beneficial ownership of securities","symbol":"NPK","title":"Initial statement of beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000177849519000001/0001778495-19-000001-index.htm","us_notice_code":"Form 3","us_title_en":"Initial statement of beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"PRIMARY DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000177849519000001/xslF345X02/primary_doc.xml","primary":true,"translateUrl":null,"linkName":"primary_doc.html","type":"3","id":"NTFILE6q9SbZns2nYrQ3Dj","market":"us","size":0},{"description":"PRIMARY DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000177849519000001/primary_doc.xml","primary":false,"translateUrl":null,"linkName":"primary_doc.xml","type":"3","id":"NTFILE4QoipZPCQE2BZvNe","market":"us","size":7127}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-06-03 00:00","pubTimestamp":1559491200,"title_zh":"Initial statement of beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8226746","market":"us","labels":[],"media":"sec.gov","original_id":"AN8017219000021-NPK","pdf_url":null,"pub_time":1558540800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 5.02, 5.07, and 9.01","symbol":"NPK","title":"Current report, items 5.02, 5.07, and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000021/0000080172-19-000021-index.htm","us_notice_code":"Form 8-K","us_title_en":"Initial statement of beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000021/npk-20190521x8k.htm","primary":true,"translateUrl":null,"linkName":"npk-20190521x8k.htm","type":"8-K","id":"NTFILEBj6hMy2titvbtLCG","market":"us","size":65858},{"description":"EX-99.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000021/npk-20190521xex99_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190521xex99_1.htm","type":"EX-99.1","id":"NTFILErKp5VHRjWg9o1wYj","market":"us","size":12754}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-05-23 00:00","pubTimestamp":1558540800,"title_zh":"Current report, items 5.02, 5.07, and 9.01","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 5.07: Submission of Matters to a Vote of Security Holders;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8177702","market":"us","labels":[],"media":"sec.gov","original_id":"AN8017219000018-NPK","pdf_url":null,"pub_time":1557417600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Quarterly report [Sections 13 or 15(d)]","symbol":"NPK","title":"Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000018/0000080172-19-000018-index.htm","us_notice_code":"Form 10-Q","us_title_en":"Current report, items 5.02 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000018/npk-20190331x10q.htm","primary":true,"translateUrl":null,"linkName":"npk-20190331x10q.htm","type":"10-Q","id":"NTFILE26tM163nHjTBm38z","market":"us","size":792760},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000018/npk-20190331xex31_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex31_1.htm","type":"EX-31.1","id":"NTFILE5Vm84VfwkPdhDYw3","market":"us","size":15360},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000018/npk-20190331xex31_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex31_2.htm","type":"EX-31.2","id":"NTFILE4kRGzoTEakV7B5xn","market":"us","size":15641},{"description":"EX-32.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000018/npk-20190331xex32_1.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex32_1.htm","type":"EX-32.1","id":"NTFILEDing41A2z4rXbVx2","market":"us","size":8931},{"description":"EX-32.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/80172/000008017219000018/npk-20190331xex32_2.htm","primary":false,"translateUrl":null,"linkName":"npk-20190331xex32_2.htm","type":"EX-32.2","id":"NTFILE97G1vqn25FnhnJZV","market":"us","size":9128}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2019-05-10 00:00","pubTimestamp":1557417600,"title_zh":"Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"6659369","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710114000668-NPK","pdf_url":null,"pub_time":1399996800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"","symbol":"NPK","title":"","titleType":"[Rev.]Quaterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710114000668/0000897101-14-000668-index.htm","us_notice_code":"Form 10-Q/A","us_title_en":"[Amend] Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"[Rev.]Quaterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"[Rev.]Quaterly Report","pubTime":"2014-05-14 00:00","pubTimestamp":1399996800,"title_zh":"","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"6659476","market":"us","labels":[],"media":"sec.gov","original_id":"AN135448809002362-NPK","pdf_url":null,"pub_time":1260979200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"","symbol":"NPK","title":"","titleType":"Correspondence","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000135448809002362/0001354488-09-002362-index.htm","us_notice_code":"Form CORRESP","us_title_en":"[Cover]Correspondence","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Correspondence","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Correspondence","pubTime":"2009-12-17 00:00","pubTimestamp":1260979200,"title_zh":"","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"6659500","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710108001345-NPK","pdf_url":null,"pub_time":1213286400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"","symbol":"NPK","title":"","titleType":"Correspondence","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710108001345/0000897101-08-001345-index.htm","us_notice_code":"Form CORRESP","us_title_en":"[Cover]Correspondence","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Correspondence","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Correspondence","pubTime":"2008-06-13 00:00","pubTimestamp":1213286400,"title_zh":"","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"6659518","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710107001804-NPK","pdf_url":null,"pub_time":1187884800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"","symbol":"NPK","title":"","titleType":"[Rev.]Annual Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710107001804/0000897101-07-001804-index.htm","us_notice_code":"Form 10-K/A","us_title_en":"[Amend] Annual report [Section 13 and 15(d), not S-K Item 405]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"[Rev.]Annual Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"[Rev.]Annual Report","pubTime":"2007-08-24 00:00","pubTimestamp":1187884800,"title_zh":"","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"6659549","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710106001057-NPK","pdf_url":null,"pub_time":1147363200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"","symbol":"NPK","title":"","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710106001057/0000897101-06-001057-index.htm","us_notice_code":"Form 8-K/A","us_title_en":"[Amend] Current report, items 2.02, 4.01, and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2006-05-12 00:00","pubTimestamp":1147363200,"title_zh":"","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"6659552","market":"us","labels":[],"media":"sec.gov","original_id":"AN89710106000869-NPK","pdf_url":null,"pub_time":1145894400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"","symbol":"NPK","title":"","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/80172/000089710106000869/0000897101-06-000869-index.htm","us_notice_code":"Form 8-K/A","us_title_en":"[Amend] Current report, items 2.02, 4.02, and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2006-04-25 00:00","pubTimestamp":1145894400,"title_zh":"","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0}],"pageSize":20,"totalPage":6,"pageCount":6,"totalSize":119,"code":"91000000","status":"200"}]}}