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| 0000015847-16-000069-index.html | 2016-07-27 16:35:42 | |
| 0000015847-16-000069.txt | 2016-07-27 16:35:42 | |
 0000015847-16-000069-xbrl.zip | 143852 | 2016-07-27 16:35:42 |
| buks-20160430.xml | 1029416 | 2016-07-27 16:35:42 |
| buks-20160430.xsd | 41523 | 2016-07-27 16:35:42 |
| buks-20160430_cal.xml | 72691 | 2016-07-27 16:35:42 |
| buks-20160430_def.xml | 184348 | 2016-07-27 16:35:42 |
| buks-20160430_lab.xml | 645068 | 2016-07-27 16:35:42 |
| buks-20160430_pre.xml | 348749 | 2016-07-27 16:35:42 |
| ex21.htm | 3671 | 2016-07-27 16:35:42 |
| ex23_1.htm | 1639 | 2016-07-27 16:35:42 |
| ex31_1.htm | 5949 | 2016-07-27 16:35:42 |
| ex31_2.htm | 5990 | 2016-07-27 16:35:42 |
| ex32_1.htm | 3646 | 2016-07-27 16:35:42 |
| ex32_2.htm | 3785 | 2016-07-27 16:35:42 |
| ex99.htm | 36502 | 2016-07-27 16:35:42 |
| FilingSummary.xml | 23005 | 2016-07-27 16:35:42 |
| Financial_Report.xlsx | 54607 | 2016-07-27 16:35:42 |
| form10k.htm | 1238973 | 2016-07-27 16:35:42 |
| R1.htm | 27509 | 2016-07-27 16:35:42 |
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| R8.htm | 60392 | 2016-07-27 16:35:42 |
| R9.htm | 40336 | 2016-07-27 16:35:42 |
| report.css | 2767 | 2016-07-27 16:35:42 |
| Show.js | 1410 | 2016-07-27 16:35:42 |