Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000059255-24-000029-index-headers.html | 2024-04-03 16:18:39 | |
| 0000059255-24-000029-index.html | 2024-04-03 16:18:39 | |
| 0000059255-24-000029.txt | 2024-04-03 16:18:39 | |
 0000059255-24-000029-xbrl.zip | 208668 | 2024-04-03 16:18:39 |
| FilingSummary.xml | 2921 | 2024-04-03 16:18:39 |
| MetaLinks.json | 93412 | 2024-04-03 16:18:39 |
| R1.htm | 8971 | 2024-04-03 16:18:39 |
| R2.htm | 129958 | 2024-04-03 16:18:39 |
| report.css | 2767 | 2024-04-03 16:18:39 |
| Show.js | 1085 | 2024-04-03 16:18:39 |
| vhl-20240523.xsd | 4290 | 2024-04-03 16:18:39 |
| vhl-20240523xdef14a.htm | 1094747 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a001.jpg | 11170 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a002.jpg | 4471 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a003.jpg | 7218 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a004.jpg | 2517 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a014.jpg | 56761 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a015.jpg | 48186 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a017.jpg | 3218 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a018.jpg | 1501 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a019.jpg | 1493 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a020.jpg | 3781 | 2024-04-03 16:18:39 |
 vhl-20240523xdef14a021.jpg | 3482 | 2024-04-03 16:18:39 |
| vhl-20240523xdef14a_htm.xml | 116962 | 2024-04-03 16:18:39 |
| vhl-20240523_def.xml | 3102 | 2024-04-03 16:18:39 |
| vhl-20240523_lab.xml | 5836 | 2024-04-03 16:18:39 |
| vhl-20240523_pre.xml | 4123 | 2024-04-03 16:18:39 |