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|---|---|---|
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| 0000950170-22-008002-index.html | 2022-05-06 08:26:17 | |
| 0000950170-22-008002.txt | 2022-05-06 08:26:17 | |
 0000950170-22-008002-xbrl.zip | 652939 | 2022-05-06 08:26:17 |
| bchg-20220331.htm | 1322577 | 2022-05-06 08:26:17 |
| bchg-20220331.xsd | 24971 | 2022-05-06 08:26:17 |
| bchg-20220331_cal.xml | 13134 | 2022-05-06 08:26:17 |
| bchg-20220331_def.xml | 27019 | 2022-05-06 08:26:17 |
| bchg-20220331_htm.xml | 621300 | 2022-05-06 08:26:17 |
| bchg-20220331_lab.xml | 140700 | 2022-05-06 08:26:17 |
| bchg-20220331_pre.xml | 100489 | 2022-05-06 08:26:17 |
| bchg-ex31_1.htm | 29069 | 2022-05-06 08:26:17 |
| bchg-ex31_2.htm | 28911 | 2022-05-06 08:26:17 |
| bchg-ex32_1.htm | 9340 | 2022-05-06 08:26:17 |
| bchg-ex32_2.htm | 9812 | 2022-05-06 08:26:17 |
| FilingSummary.xml | 18662 | 2022-05-06 08:26:17 |
| Financial_Report.xlsx | 44402 | 2022-05-06 08:26:17 |
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| MetaLinks.json | 212966 | 2022-05-06 08:26:17 |
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| R11.htm | 12992 | 2022-05-06 08:26:17 |
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| R21.htm | 4058 | 2022-05-06 08:26:17 |
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| R27.htm | 34865 | 2022-05-06 08:26:17 |
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| R6.htm | 34769 | 2022-05-06 08:26:17 |
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| R8.htm | 70822 | 2022-05-06 08:26:17 |
| R9.htm | 57942 | 2022-05-06 08:26:17 |
| report.css | 2767 | 2022-05-06 08:26:17 |
| Show.js | 1085 | 2022-05-06 08:26:17 |