Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001477932-21-001377-index-headers.html | 2021-03-11 17:01:09 | |
| 0001477932-21-001377-index.html | 2021-03-11 17:01:09 | |
| 0001477932-21-001377.txt | 2021-03-11 17:01:09 | |
 0001477932-21-001377-xbrl.zip | 73088 | 2021-03-11 17:01:09 |
| btb-20210103.xml | 308186 | 2021-03-11 17:01:09 |
| btb-20210103.xsd | 31494 | 2021-03-11 17:01:09 |
| btb-20210103_cal.xml | 40522 | 2021-03-11 17:01:09 |
| btb-20210103_def.xml | 76089 | 2021-03-11 17:01:09 |
| btb-20210103_lab.xml | 201298 | 2021-03-11 17:01:09 |
| btb-20210103_pre.xml | 170216 | 2021-03-11 17:01:09 |
| btbd_10k.htm | 714032 | 2021-03-11 17:01:09 |
 btbd_10kimg1.jpg | 6451 | 2021-03-11 17:01:09 |
 btbd_10kimg5.jpg | 2854 | 2021-03-11 17:01:09 |
 btbd_10kimg6.jpg | 3349 | 2021-03-11 17:01:09 |
 btbd_10kimg8.jpg | 938 | 2021-03-11 17:01:09 |
| btbd_ex1011.htm | 27593 | 2021-03-11 17:01:09 |
| btbd_ex231.htm | 1888 | 2021-03-11 17:01:09 |
 btbd_ex231img1.jpg | 3127 | 2021-03-11 17:01:09 |
| btbd_ex311.htm | 8421 | 2021-03-11 17:01:09 |
| btbd_ex312.htm | 8575 | 2021-03-11 17:01:09 |
| btbd_ex321.htm | 3342 | 2021-03-11 17:01:09 |
| btbd_ex322.htm | 3346 | 2021-03-11 17:01:09 |
| btbd_ex44.htm | 6608 | 2021-03-11 17:01:09 |
| FilingSummary.xml | 20452 | 2021-03-11 17:01:09 |
| Financial_Report.xlsx | 54391 | 2021-03-11 17:01:09 |
| R1.htm | 40772 | 2021-03-11 17:01:09 |
| R10.htm | 6501 | 2021-03-11 17:01:09 |
| R11.htm | 25773 | 2021-03-11 17:01:09 |
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| R13.htm | 2731 | 2021-03-11 17:01:09 |
| R14.htm | 4765 | 2021-03-11 17:01:09 |
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| R18.htm | 22586 | 2021-03-11 17:01:09 |
| R19.htm | 11824 | 2021-03-11 17:01:09 |
| R2.htm | 67650 | 2021-03-11 17:01:09 |
| R20.htm | 11479 | 2021-03-11 17:01:09 |
| R21.htm | 25815 | 2021-03-11 17:01:09 |
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| R26.htm | 18448 | 2021-03-11 17:01:09 |
| R27.htm | 4737 | 2021-03-11 17:01:09 |
| R28.htm | 19491 | 2021-03-11 17:01:09 |
| R29.htm | 36240 | 2021-03-11 17:01:09 |
| R3.htm | 14541 | 2021-03-11 17:01:09 |
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| R31.htm | 19792 | 2021-03-11 17:01:09 |
| R32.htm | 5489 | 2021-03-11 17:01:09 |
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| R35.htm | 7037 | 2021-03-11 17:01:09 |
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| R8.htm | 12319 | 2021-03-11 17:01:09 |
| R9.htm | 12122 | 2021-03-11 17:01:09 |
| report.css | 2767 | 2021-03-11 17:01:09 |
| Show.js | 1085 | 2021-03-11 17:01:09 |