Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-22-018010-index-headers.html | 2022-09-01 08:58:58 | |
| 0000950170-22-018010-index.html | 2022-09-01 08:58:58 | |
| 0000950170-22-018010.txt | 2022-09-01 08:58:58 | |
 0000950170-22-018010-xbrl.zip | 792508 | 2022-09-01 08:58:58 |
| bchg-20220630.htm | 2985910 | 2022-09-01 08:58:58 |
| bchg-20220630.xsd | 27925 | 2022-09-01 08:58:58 |
| bchg-20220630_cal.xml | 16432 | 2022-09-01 08:58:58 |
| bchg-20220630_def.xml | 30847 | 2022-09-01 08:58:58 |
| bchg-20220630_htm.xml | 1076275 | 2022-09-01 08:58:58 |
| bchg-20220630_lab.xml | 159790 | 2022-09-01 08:58:58 |
| bchg-20220630_pre.xml | 118388 | 2022-09-01 08:58:58 |
| bchg-ex10_1.htm | 448003 | 2022-09-01 08:58:58 |
| bchg-ex31_1.htm | 30530 | 2022-09-01 08:58:58 |
| bchg-ex31_2.htm | 30549 | 2022-09-01 08:58:58 |
| bchg-ex32_1.htm | 9677 | 2022-09-01 08:58:58 |
| bchg-ex32_2.htm | 9698 | 2022-09-01 08:58:58 |
| bchg-ex4_6.htm | 46500 | 2022-09-01 08:58:58 |
| FilingSummary.xml | 20374 | 2022-09-01 08:58:58 |
| Financial_Report.xlsx | 50292 | 2022-09-01 08:58:58 |
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 img195526414_2.jpg | 284303 | 2022-09-01 08:58:58 |
| MetaLinks.json | 237701 | 2022-09-01 08:58:58 |
| R1.htm | 68163 | 2022-09-01 08:58:58 |
| R10.htm | 13176 | 2022-09-01 08:58:58 |
| R11.htm | 12773 | 2022-09-01 08:58:58 |
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| R19.htm | 55829 | 2022-09-01 08:58:58 |
| R2.htm | 43772 | 2022-09-01 08:58:58 |
| R20.htm | 79087 | 2022-09-01 08:58:58 |
| R21.htm | 187269 | 2022-09-01 08:58:58 |
| R22.htm | 78752 | 2022-09-01 08:58:58 |
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| R26.htm | 28382 | 2022-09-01 08:58:58 |
| R27.htm | 3959 | 2022-09-01 08:58:58 |
| R28.htm | 4928 | 2022-09-01 08:58:58 |
| R29.htm | 32537 | 2022-09-01 08:58:58 |
| R3.htm | 4293 | 2022-09-01 08:58:58 |
| R30.htm | 20131 | 2022-09-01 08:58:58 |
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| R4.htm | 13845 | 2022-09-01 08:58:58 |
| R5.htm | 21696 | 2022-09-01 08:58:58 |
| R6.htm | 37736 | 2022-09-01 08:58:58 |
| R7.htm | 13941 | 2022-09-01 08:58:58 |
| R8.htm | 74010 | 2022-09-01 08:58:58 |
| R9.htm | 86538 | 2022-09-01 08:58:58 |
| report.css | 2767 | 2022-09-01 08:58:58 |
| Show.js | 1085 | 2022-09-01 08:58:58 |