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|---|---|---|
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| 0001193125-19-039489-index.html | 2019-02-14 09:02:02 | |
| 0001193125-19-039489.txt | 2019-02-14 09:02:02 | |
 0001193125-19-039489-xbrl.zip | 77002 | 2019-02-14 09:02:02 |
| d676198d10q.htm | 441166 | 2019-02-14 09:02:02 |
| d676198dex103.htm | 34291 | 2019-02-14 09:02:02 |
| d676198dex311.htm | 11253 | 2019-02-14 09:02:02 |
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| d676198dex321.htm | 2523 | 2019-02-14 09:02:02 |
| d676198dex322.htm | 2497 | 2019-02-14 09:02:02 |
| FilingSummary.xml | 21932 | 2019-02-14 09:02:02 |
| Financial_Report.xlsx | 42054 | 2019-02-14 09:02:02 |
| nick-20181231.xml | 643474 | 2019-02-14 09:02:02 |
| nick-20181231.xsd | 30932 | 2019-02-14 09:02:02 |
| nick-20181231_cal.xml | 31997 | 2019-02-14 09:02:02 |
| nick-20181231_def.xml | 97097 | 2019-02-14 09:02:02 |
| nick-20181231_lab.xml | 254301 | 2019-02-14 09:02:02 |
| nick-20181231_pre.xml | 178246 | 2019-02-14 09:02:02 |
| R1.htm | 25465 | 2019-02-14 09:02:02 |
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| R9.htm | 92097 | 2019-02-14 09:02:02 |
| report.css | 2767 | 2019-02-14 09:02:02 |
| Show.js | 1085 | 2019-02-14 09:02:02 |