Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-005884-index-headers.html | 2021-03-12 14:35:50 | |
| 0001437749-21-005884-index.html | 2021-03-12 14:35:50 | |
| 0001437749-21-005884.txt | 2021-03-12 14:35:50 | |
 0001437749-21-005884-xbrl.zip | 79612 | 2021-03-12 14:35:50 |
| buks-20210131.xml | 420158 | 2021-03-12 14:35:50 |
| buks-20210131.xsd | 38110 | 2021-03-12 14:35:50 |
| buks-20210131_cal.xml | 48873 | 2021-03-12 14:35:50 |
| buks-20210131_def.xml | 249824 | 2021-03-12 14:35:50 |
| buks-20210131_lab.xml | 226890 | 2021-03-12 14:35:50 |
| buks-20210131_pre.xml | 274218 | 2021-03-12 14:35:50 |
| buks20210131_10q.htm | 1037855 | 2021-03-12 14:35:50 |
| ex_228299.htm | 14141 | 2021-03-12 14:35:50 |
| ex_228300.htm | 14142 | 2021-03-12 14:35:50 |
| ex_228301.htm | 6715 | 2021-03-12 14:35:50 |
| ex_228302.htm | 6691 | 2021-03-12 14:35:50 |
| ex_233086.htm | 131874 | 2021-03-12 14:35:50 |
| FilingSummary.xml | 24946 | 2021-03-12 14:35:50 |
| Financial_Report.xlsx | 47492 | 2021-03-12 14:35:50 |
| R1.htm | 32791 | 2021-03-12 14:35:50 |
| R10.htm | 5183 | 2021-03-12 14:35:50 |
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| R17.htm | 19773 | 2021-03-12 14:35:50 |
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| R2.htm | 145689 | 2021-03-12 14:35:50 |
| R20.htm | 5876 | 2021-03-12 14:35:50 |
| R21.htm | 37475 | 2021-03-12 14:35:50 |
| R22.htm | 19059 | 2021-03-12 14:35:50 |
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| R26.htm | 3983 | 2021-03-12 14:35:50 |
| R27.htm | 43160 | 2021-03-12 14:35:50 |
| R28.htm | 10964 | 2021-03-12 14:35:50 |
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| R30.htm | 3080 | 2021-03-12 14:35:50 |
| R31.htm | 17810 | 2021-03-12 14:35:50 |
| R32.htm | 7893 | 2021-03-12 14:35:50 |
| R33.htm | 7331 | 2021-03-12 14:35:50 |
| R34.htm | 24436 | 2021-03-12 14:35:50 |
| R35.htm | 11748 | 2021-03-12 14:35:50 |
| R36.htm | 19237 | 2021-03-12 14:35:50 |
| R37.htm | 8326 | 2021-03-12 14:35:50 |
| R38.htm | 5151 | 2021-03-12 14:35:50 |
| R4.htm | 87240 | 2021-03-12 14:35:50 |
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| R6.htm | 87474 | 2021-03-12 14:35:50 |
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| R8.htm | 6236 | 2021-03-12 14:35:50 |
| R9.htm | 22736 | 2021-03-12 14:35:50 |
| report.css | 2767 | 2021-03-12 14:35:50 |
| Show.js | 1085 | 2021-03-12 14:35:50 |