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| 0001437749-22-006243.txt | 2022-03-15 10:31:08 | |
 0001437749-22-006243-xbrl.zip | 155708 | 2022-03-15 10:31:08 |
| buks-20220131.xsd | 53705 | 2022-03-15 10:31:08 |
| buks-20220131_cal.xml | 49349 | 2022-03-15 10:31:08 |
| buks-20220131_def.xml | 342897 | 2022-03-15 10:31:08 |
| buks-20220131_lab.xml | 300883 | 2022-03-15 10:31:08 |
| buks-20220131_pre.xml | 372324 | 2022-03-15 10:31:08 |
| buks20220223_10q.htm | 1523632 | 2022-03-15 10:31:08 |
| buks20220223_10q_htm.xml | 987049 | 2022-03-15 10:31:08 |
| ex_339390.htm | 14140 | 2022-03-15 10:31:08 |
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| ex_339392.htm | 6714 | 2022-03-15 10:31:08 |
| ex_339393.htm | 6690 | 2022-03-15 10:31:08 |
| FilingSummary.xml | 34858 | 2022-03-15 10:31:08 |
| Financial_Report.xlsx | 62866 | 2022-03-15 10:31:08 |
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| R1.htm | 49173 | 2022-03-15 10:31:08 |
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| report.css | 2767 | 2022-03-15 10:31:08 |
| Show.js | 1085 | 2022-03-15 10:31:08 |