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| 0001437749-22-020369.txt | 2022-08-12 16:36:39 | |
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| ex_392411.htm | 10568 | 2022-08-12 16:36:39 |
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| Financial_Report.xlsx | 43405 | 2022-08-12 16:36:39 |
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| npk-20220703.xsd | 27959 | 2022-08-12 16:36:39 |
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| report.css | 2767 | 2022-08-12 16:36:39 |
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