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| 0001062993-22-008984-index.html | 2022-03-30 15:22:58 | |
| 0001062993-22-008984.txt | 2022-03-30 15:22:58 | |
 0001062993-22-008984-xbrl.zip | 795012 | 2022-03-30 15:22:58 |
| btg-20211231.xsd | 123900 | 2022-03-30 15:22:58 |
| btg-20211231_cal.xml | 113063 | 2022-03-30 15:22:58 |
| btg-20211231_def.xml | 587047 | 2022-03-30 15:22:58 |
| btg-20211231_lab.xml | 1070215 | 2022-03-30 15:22:58 |
| btg-20211231_pre.xml | 798577 | 2022-03-30 15:22:58 |
| exhibit99-1.htm | 679178 | 2022-03-30 15:22:58 |
| exhibit99-10.htm | 3140 | 2022-03-30 15:22:58 |
| exhibit99-11.htm | 2280 | 2022-03-30 15:22:58 |
| exhibit99-12.htm | 2557 | 2022-03-30 15:22:58 |
| exhibit99-13.htm | 2319 | 2022-03-30 15:22:58 |
| exhibit99-14.htm | 2127 | 2022-03-30 15:22:58 |
| exhibit99-15.htm | 2479 | 2022-03-30 15:22:58 |
| exhibit99-16.htm | 52943 | 2022-03-30 15:22:58 |
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| exhibit99-2.htm | 3325638 | 2022-03-30 15:22:58 |
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| exhibit99-3.htm | 1009862 | 2022-03-30 15:22:58 |
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| exhibit99-6.htm | 3627 | 2022-03-30 15:22:58 |
| exhibit99-7.htm | 3679 | 2022-03-30 15:22:58 |
| exhibit99-8.htm | 1972 | 2022-03-30 15:22:58 |
| exhibit99-9.htm | 2517 | 2022-03-30 15:22:58 |
| FilingSummary.xml | 56768 | 2022-03-30 15:22:58 |
| Financial_Report.xlsx | 170679 | 2022-03-30 15:22:58 |
| form40f.htm | 104241 | 2022-03-30 15:22:58 |
| form40f_htm.xml | 4152487 | 2022-03-30 15:22:58 |
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| report.css | 2768 | 2022-03-30 15:22:58 |
| Show.js | 1086 | 2022-03-30 15:22:58 |