Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000729580-16-000036-index-headers.html | 2016-03-11 15:52:03 | |
| 0000729580-16-000036-index.html | 2016-03-11 15:52:03 | |
| 0000729580-16-000036.txt | 2016-03-11 15:52:03 | |
 0000729580-16-000036-xbrl.zip | 311827 | 2016-03-11 15:52:03 |
| bel10-k.htm | 2364716 | 2016-03-11 15:52:03 |
| belfb-20151231.xml | 3213039 | 2016-03-11 15:52:03 |
| belfb-20151231.xsd | 71792 | 2016-03-11 15:52:03 |
| belfb-20151231_cal.xml | 112904 | 2016-03-11 15:52:03 |
| belfb-20151231_def.xml | 484011 | 2016-03-11 15:52:03 |
| belfb-20151231_lab.xml | 1220627 | 2016-03-11 15:52:03 |
| belfb-20151231_pre.xml | 682648 | 2016-03-11 15:52:03 |
| ex12-1.htm | 41738 | 2016-03-11 15:52:03 |
| ex21-1.htm | 40539 | 2016-03-11 15:52:03 |
| ex23-1.htm | 1953 | 2016-03-11 15:52:03 |
| ex31-1.htm | 11266 | 2016-03-11 15:52:03 |
| ex31-2.htm | 12008 | 2016-03-11 15:52:03 |
| ex32-1.htm | 4303 | 2016-03-11 15:52:03 |
| ex32-2.htm | 4714 | 2016-03-11 15:52:03 |
| FilingSummary.xml | 35890 | 2016-03-11 15:52:03 |
| Financial_Report.xlsx | 121062 | 2016-03-11 15:52:03 |
 image00002.jpg | 71659 | 2016-03-11 15:52:03 |
| R1.htm | 32383 | 2016-03-11 15:52:03 |
| R10.htm | 100228 | 2016-03-11 15:52:03 |
| R11.htm | 160098 | 2016-03-11 15:52:03 |
| R12.htm | 33664 | 2016-03-11 15:52:03 |
| R13.htm | 113642 | 2016-03-11 15:52:03 |
| R14.htm | 11766 | 2016-03-11 15:52:03 |
| R15.htm | 8107 | 2016-03-11 15:52:03 |
| R16.htm | 13835 | 2016-03-11 15:52:03 |
| R17.htm | 18821 | 2016-03-11 15:52:03 |
| R18.htm | 178765 | 2016-03-11 15:52:03 |
| R19.htm | 18767 | 2016-03-11 15:52:03 |
| R2.htm | 85421 | 2016-03-11 15:52:03 |
| R20.htm | 31262 | 2016-03-11 15:52:03 |
| R21.htm | 218200 | 2016-03-11 15:52:03 |
| R22.htm | 70401 | 2016-03-11 15:52:03 |
| R23.htm | 23901 | 2016-03-11 15:52:03 |
| R24.htm | 7567 | 2016-03-11 15:52:03 |
| R25.htm | 21098 | 2016-03-11 15:52:03 |
| R26.htm | 74792 | 2016-03-11 15:52:03 |
| R27.htm | 7286 | 2016-03-11 15:52:03 |
| R28.htm | 78691 | 2016-03-11 15:52:03 |
| R29.htm | 80808 | 2016-03-11 15:52:03 |
| R3.htm | 26713 | 2016-03-11 15:52:03 |
| R30.htm | 147832 | 2016-03-11 15:52:03 |
| R31.htm | 57667 | 2016-03-11 15:52:03 |
| R32.htm | 151377 | 2016-03-11 15:52:03 |
| R33.htm | 31433 | 2016-03-11 15:52:03 |
| R34.htm | 109656 | 2016-03-11 15:52:03 |
| R35.htm | 12563 | 2016-03-11 15:52:03 |
| R36.htm | 17330 | 2016-03-11 15:52:03 |
| R37.htm | 169445 | 2016-03-11 15:52:03 |
| R38.htm | 11794 | 2016-03-11 15:52:03 |
| R39.htm | 33030 | 2016-03-11 15:52:03 |
| R4.htm | 41266 | 2016-03-11 15:52:03 |
| R40.htm | 218613 | 2016-03-11 15:52:03 |
| R41.htm | 69422 | 2016-03-11 15:52:03 |
| R42.htm | 18230 | 2016-03-11 15:52:03 |
| R43.htm | 12037 | 2016-03-11 15:52:03 |
| R44.htm | 73795 | 2016-03-11 15:52:03 |
| R45.htm | 77138 | 2016-03-11 15:52:03 |
| R46.htm | 137124 | 2016-03-11 15:52:03 |
| R47.htm | 305408 | 2016-03-11 15:52:03 |
| R48.htm | 16958 | 2016-03-11 15:52:03 |
| R49.htm | 77637 | 2016-03-11 15:52:03 |
| R5.htm | 24358 | 2016-03-11 15:52:03 |
| R50.htm | 18602 | 2016-03-11 15:52:03 |
| R51.htm | 26222 | 2016-03-11 15:52:03 |
| R52.htm | 12574 | 2016-03-11 15:52:03 |
| R53.htm | 21218 | 2016-03-11 15:52:03 |
| R54.htm | 287592 | 2016-03-11 15:52:03 |
| R55.htm | 85655 | 2016-03-11 15:52:03 |
| R56.htm | 35046 | 2016-03-11 15:52:03 |
| R57.htm | 134435 | 2016-03-11 15:52:03 |
| R58.htm | 104018 | 2016-03-11 15:52:03 |
| R59.htm | 136858 | 2016-03-11 15:52:03 |
| R6.htm | 12738 | 2016-03-11 15:52:03 |
| R60.htm | 53694 | 2016-03-11 15:52:03 |
| R61.htm | 33265 | 2016-03-11 15:52:03 |
| R62.htm | 48671 | 2016-03-11 15:52:03 |
| R63.htm | 53859 | 2016-03-11 15:52:03 |
| R64.htm | 8696 | 2016-03-11 15:52:03 |
| R65.htm | 36735 | 2016-03-11 15:52:03 |
| R66.htm | 23650 | 2016-03-11 15:52:03 |
| R7.htm | 63208 | 2016-03-11 15:52:03 |
| R8.htm | 12667 | 2016-03-11 15:52:03 |
| R9.htm | 114747 | 2016-03-11 15:52:03 |
| report.css | 2767 | 2016-03-11 15:52:03 |
| Show.js | 1410 | 2016-03-11 15:52:03 |