Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-24-009414-index-headers.html | 2024-01-31 16:22:26 | |
| 0000950170-24-009414-index.html | 2024-01-31 16:22:26 | |
| 0000950170-24-009414.txt | 2024-01-31 16:22:26 | |
 0000950170-24-009414-xbrl.zip | 191190 | 2024-01-31 16:22:26 |
| bv-20231231.htm | 1646959 | 2024-01-31 16:22:26 |
| bv-20231231.xsd | 1183787 | 2024-01-31 16:22:26 |
| bv-20231231_htm.xml | 1333232 | 2024-01-31 16:22:26 |
| bv-ex10_1.htm | 184344 | 2024-01-31 16:22:26 |
| bv-ex10_2.htm | 45894 | 2024-01-31 16:22:26 |
| bv-ex10_3.htm | 184341 | 2024-01-31 16:22:26 |
| bv-ex10_4.htm | 249657 | 2024-01-31 16:22:26 |
| bv-ex10_5.htm | 17853 | 2024-01-31 16:22:26 |
| bv-ex31_1.htm | 12776 | 2024-01-31 16:22:26 |
| bv-ex31_2.htm | 14024 | 2024-01-31 16:22:26 |
| bv-ex32_1.htm | 5986 | 2024-01-31 16:22:26 |
| bv-ex32_2.htm | 5789 | 2024-01-31 16:22:26 |
| FilingSummary.xml | 40853 | 2024-01-31 16:22:26 |
| Financial_Report.xlsx | 92450 | 2024-01-31 16:22:26 |
| MetaLinks.json | 815925 | 2024-01-31 16:22:26 |
| R1.htm | 53069 | 2024-01-31 16:22:26 |
| R10.htm | 19835 | 2024-01-31 16:22:26 |
| R11.htm | 49582 | 2024-01-31 16:22:26 |
| R12.htm | 7814 | 2024-01-31 16:22:26 |
| R13.htm | 38470 | 2024-01-31 16:22:26 |
| R14.htm | 59589 | 2024-01-31 16:22:26 |
| R15.htm | 53985 | 2024-01-31 16:22:26 |
| R16.htm | 99480 | 2024-01-31 16:22:26 |
| R17.htm | 20328 | 2024-01-31 16:22:26 |
| R18.htm | 78849 | 2024-01-31 16:22:26 |
| R19.htm | 15438 | 2024-01-31 16:22:26 |
| R2.htm | 114092 | 2024-01-31 16:22:26 |
| R20.htm | 91462 | 2024-01-31 16:22:26 |
| R21.htm | 11704 | 2024-01-31 16:22:26 |
| R22.htm | 33200 | 2024-01-31 16:22:26 |
| R23.htm | 6371 | 2024-01-31 16:22:26 |
| R24.htm | 11459 | 2024-01-31 16:22:26 |
| R25.htm | 33898 | 2024-01-31 16:22:26 |
| R26.htm | 35794 | 2024-01-31 16:22:26 |
| R27.htm | 57557 | 2024-01-31 16:22:26 |
| R28.htm | 37761 | 2024-01-31 16:22:26 |
| R29.htm | 90700 | 2024-01-31 16:22:26 |
| R3.htm | 28675 | 2024-01-31 16:22:26 |
| R30.htm | 16820 | 2024-01-31 16:22:26 |
| R31.htm | 66037 | 2024-01-31 16:22:26 |
| R32.htm | 84488 | 2024-01-31 16:22:26 |
| R33.htm | 29637 | 2024-01-31 16:22:26 |
| R34.htm | 4350 | 2024-01-31 16:22:26 |
| R35.htm | 17671 | 2024-01-31 16:22:26 |
| R36.htm | 20938 | 2024-01-31 16:22:26 |
| R37.htm | 12736 | 2024-01-31 16:22:26 |
| R38.htm | 8729 | 2024-01-31 16:22:26 |
| R39.htm | 10189 | 2024-01-31 16:22:26 |
| R4.htm | 72601 | 2024-01-31 16:22:26 |
| R40.htm | 34765 | 2024-01-31 16:22:26 |
| R41.htm | 4733 | 2024-01-31 16:22:26 |
| R42.htm | 24739 | 2024-01-31 16:22:26 |
| R43.htm | 17889 | 2024-01-31 16:22:26 |
| R44.htm | 18341 | 2024-01-31 16:22:26 |
| R45.htm | 20716 | 2024-01-31 16:22:26 |
| R46.htm | 98476 | 2024-01-31 16:22:26 |
| R47.htm | 24232 | 2024-01-31 16:22:26 |
| R48.htm | 19090 | 2024-01-31 16:22:26 |
| R49.htm | 41529 | 2024-01-31 16:22:26 |
| R5.htm | 29056 | 2024-01-31 16:22:26 |
| R50.htm | 14186 | 2024-01-31 16:22:26 |
| R51.htm | 12955 | 2024-01-31 16:22:26 |
| R52.htm | 79218 | 2024-01-31 16:22:26 |
| R53.htm | 23503 | 2024-01-31 16:22:26 |
| R54.htm | 31770 | 2024-01-31 16:22:26 |
| R55.htm | 23205 | 2024-01-31 16:22:26 |
| R56.htm | 30009 | 2024-01-31 16:22:26 |
| R57.htm | 16183 | 2024-01-31 16:22:26 |
| R58.htm | 4794 | 2024-01-31 16:22:26 |
| R59.htm | 62993 | 2024-01-31 16:22:26 |
| R6.htm | 8284 | 2024-01-31 16:22:26 |
| R60.htm | 19178 | 2024-01-31 16:22:26 |
| R61.htm | 43842 | 2024-01-31 16:22:26 |
| R62.htm | 6614 | 2024-01-31 16:22:26 |
| R7.htm | 46842 | 2024-01-31 16:22:26 |
| R8.htm | 96954 | 2024-01-31 16:22:26 |
| R9.htm | 11187 | 2024-01-31 16:22:26 |
| report.css | 2767 | 2024-01-31 16:22:26 |
| Show.js | 1085 | 2024-01-31 16:22:26 |