Current Report — Form 8-K
Filing Table of Contents
Document/Exhibit Description Pages Size
1: 8-K Form 8K Dated March 30, 2021 HTML 30K
2: EX-99.1 Press Release Dated April 1, 2021 HTML 8K
7: R1 Cover HTML 46K
9: XML IDEA XML File -- Filing Summary XML 11K
6: XML XBRL Instance -- presto210494_8k_htm XML 15K
8: EXCEL IDEA Workbook of Financial Reports XLSX 6K
4: EX-101.LAB XBRL Labels -- npk-20210330_lab XML 96K
5: EX-101.PRE XBRL Presentations -- npk-20210330_pre XML 64K
3: EX-101.SCH XBRL Schema -- npk-20210330 XSD 11K
10: JSON XBRL Instance as JSON Data -- MetaLinks 25± 32K
11: ZIP XBRL Zipped Folder -- 0000897101-21-000270-xbrl Zip 13K
Filing Submission 0000897101-21-000270 – SGML Text
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