Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001140361-19-014739-index-headers.html | 2019-08-09 16:06:44 | |
| 0001140361-19-014739-index.html | 2019-08-09 16:06:44 | |
| 0001140361-19-014739.txt | 2019-08-09 16:06:44 | |
 0001140361-19-014739-xbrl.zip | 112129 | 2019-08-09 16:06:44 |
| ex31_1.htm | 7249 | 2019-08-09 16:06:44 |
| ex31_2.htm | 7257 | 2019-08-09 16:06:44 |
| ex32_1.htm | 5392 | 2019-08-09 16:06:44 |
| ex32_2.htm | 5449 | 2019-08-09 16:06:44 |
| FilingSummary.xml | 18140 | 2019-08-09 16:06:44 |
| Financial_Report.xlsx | 45911 | 2019-08-09 16:06:44 |
| form10q.htm | 676801 | 2019-08-09 16:06:44 |
 image00002.jpg | 1379 | 2019-08-09 16:06:44 |
| R1.htm | 32415 | 2019-08-09 16:06:44 |
| R10.htm | 72612 | 2019-08-09 16:06:44 |
| R11.htm | 7745 | 2019-08-09 16:06:44 |
| R12.htm | 6056 | 2019-08-09 16:06:44 |
| R13.htm | 9562 | 2019-08-09 16:06:44 |
| R14.htm | 19782 | 2019-08-09 16:06:44 |
| R15.htm | 21107 | 2019-08-09 16:06:44 |
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| R18.htm | 100802 | 2019-08-09 16:06:44 |
| R19.htm | 60785 | 2019-08-09 16:06:44 |
| R2.htm | 60057 | 2019-08-09 16:06:44 |
| R20.htm | 18970 | 2019-08-09 16:06:44 |
| R21.htm | 8799 | 2019-08-09 16:06:44 |
| R22.htm | 51828 | 2019-08-09 16:06:44 |
| R23.htm | 27979 | 2019-08-09 16:06:44 |
| R24.htm | 17413 | 2019-08-09 16:06:44 |
| R25.htm | 58070 | 2019-08-09 16:06:44 |
| R26.htm | 22026 | 2019-08-09 16:06:44 |
| R27.htm | 21508 | 2019-08-09 16:06:44 |
| R28.htm | 25250 | 2019-08-09 16:06:44 |
| R29.htm | 16605 | 2019-08-09 16:06:44 |
| R3.htm | 19020 | 2019-08-09 16:06:44 |
| R30.htm | 19289 | 2019-08-09 16:06:44 |
| R4.htm | 31165 | 2019-08-09 16:06:44 |
| R5.htm | 16697 | 2019-08-09 16:06:44 |
| R6.htm | 67854 | 2019-08-09 16:06:44 |
| R7.htm | 6270 | 2019-08-09 16:06:44 |
| R8.htm | 55910 | 2019-08-09 16:06:44 |
| R9.htm | 7629 | 2019-08-09 16:06:44 |
| report.css | 2767 | 2019-08-09 16:06:44 |
| Show.js | 1085 | 2019-08-09 16:06:44 |
| vhc-20190630.xml | 509107 | 2019-08-09 16:06:44 |
| vhc-20190630.xsd | 26108 | 2019-08-09 16:06:44 |
| vhc-20190630_cal.xml | 32747 | 2019-08-09 16:06:44 |
| vhc-20190630_def.xml | 191192 | 2019-08-09 16:06:44 |
| vhc-20190630_lab.xml | 422263 | 2019-08-09 16:06:44 |
| vhc-20190630_pre.xml | 252261 | 2019-08-09 16:06:44 |