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| 0001213900-22-071182-index.html | 2022-11-10 16:15:13 | |
| 0001213900-22-071182.txt | 2022-11-10 16:15:13 | |
 0001213900-22-071182-xbrl.zip | 178533 | 2022-11-10 16:15:13 |
| ex311_1.htm | 12541 | 2022-11-10 16:15:13 |
| ex312_2.htm | 9547 | 2022-11-10 16:15:13 |
| ex321_3.htm | 9513 | 2022-11-10 16:15:13 |
| FilingSummary.xml | 25790 | 2022-11-10 16:15:13 |
| Financial_Report.xlsx | 69432 | 2022-11-10 16:15:13 |
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| nn-20220930.htm | 1959053 | 2022-11-10 16:15:13 |
| nn-20220930.xsd | 35830 | 2022-11-10 16:15:13 |
| nn-20220930_cal.xml | 70082 | 2022-11-10 16:15:13 |
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| nn-20220930_htm.xml | 839027 | 2022-11-10 16:15:13 |
| nn-20220930_lab.xml | 579344 | 2022-11-10 16:15:13 |
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| R1.htm | 54897 | 2022-11-10 16:15:13 |
| R10.htm | 34748 | 2022-11-10 16:15:13 |
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| R2.htm | 95610 | 2022-11-10 16:15:13 |
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| R21.htm | 31475 | 2022-11-10 16:15:13 |
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| R32.htm | 17554 | 2022-11-10 16:15:13 |
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| R8.htm | 121762 | 2022-11-10 16:15:13 |
| R9.htm | 14932 | 2022-11-10 16:15:13 |
| report.css | 2767 | 2022-11-10 16:15:13 |
| Show.js | 1085 | 2022-11-10 16:15:13 |