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| 0001654954-19-005464-index.html | 2019-05-08 16:46:47 | |
| 0001654954-19-005464.txt | 2019-05-08 16:46:47 | |
 0001654954-19-005464-xbrl.zip | 61524 | 2019-05-08 16:46:47 |
| bkti-20190331.xml | 396036 | 2019-05-08 16:46:47 |
| bkti-20190331.xsd | 21709 | 2019-05-08 16:46:47 |
| bkti-20190331_cal.xml | 45269 | 2019-05-08 16:46:47 |
| bkti-20190331_def.xml | 26294 | 2019-05-08 16:46:47 |
| bkti-20190331_lab.xml | 205038 | 2019-05-08 16:46:47 |
| bkti-20190331_pre.xml | 145473 | 2019-05-08 16:46:47 |
| bkti_10q.htm | 603465 | 2019-05-08 16:46:47 |
| bkti_ex311.htm | 10072 | 2019-05-08 16:46:47 |
| bkti_ex312.htm | 10187 | 2019-05-08 16:46:47 |
| bkti_ex321.htm | 5502 | 2019-05-08 16:46:47 |
| bkti_ex322.htm | 5686 | 2019-05-08 16:46:47 |
| FilingSummary.xml | 20771 | 2019-05-08 16:46:47 |
| Financial_Report.xlsx | 41607 | 2019-05-08 16:46:47 |
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| R9.htm | 7996 | 2019-05-08 16:46:47 |
| report.css | 2767 | 2019-05-08 16:46:47 |
| Show.js | 1085 | 2019-05-08 16:46:47 |