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| 0001564590-18-020940-index.html | 2018-08-09 14:38:59 | |
| 0001564590-18-020940.txt | 2018-08-09 14:38:59 | |
 0001564590-18-020940-xbrl.zip | 243501 | 2018-08-09 14:38:59 |
| FilingSummary.xml | 36494 | 2018-08-09 14:38:59 |
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| navg-10q_20180630.htm | 7710014 | 2018-08-09 14:38:59 |
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| report.css | 2767 | 2018-08-09 14:38:59 |
| Show.js | 1410 | 2018-08-09 14:38:59 |