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| 0000071829-19-000043-index.html | 2019-04-26 12:08:36 | |
| 0000071829-19-000043.txt | 2019-04-26 12:08:36 | |
 0000071829-19-000043-xbrl.zip | 132328 | 2019-04-26 12:08:36 |
| a2019q110q.htm | 753824 | 2019-04-26 12:08:36 |
| a2019q110qexhibit101.htm | 138940 | 2019-04-26 12:08:36 |
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| a2019q110qexhibit311.htm | 11735 | 2019-04-26 12:08:36 |
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| a2019q110qexhibit321.htm | 6096 | 2019-04-26 12:08:36 |
| a2019q110qexhibit322.htm | 6038 | 2019-04-26 12:08:36 |
| a2019q110qexhibit951.htm | 50325 | 2019-04-26 12:08:36 |
| FilingSummary.xml | 28925 | 2019-04-26 12:08:36 |
| Financial_Report.xlsx | 51245 | 2019-04-26 12:08:36 |
| nr-20190331.xml | 776918 | 2019-04-26 12:08:36 |
| nr-20190331.xsd | 38910 | 2019-04-26 12:08:36 |
| nr-20190331_cal.xml | 85199 | 2019-04-26 12:08:36 |
| nr-20190331_def.xml | 147780 | 2019-04-26 12:08:36 |
| nr-20190331_lab.xml | 480062 | 2019-04-26 12:08:36 |
| nr-20190331_pre.xml | 272705 | 2019-04-26 12:08:36 |
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| R1.htm | 25422 | 2019-04-26 12:08:36 |
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| report.css | 2767 | 2019-04-26 12:08:36 |
| Show.js | 1085 | 2019-04-26 12:08:36 |