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| 0001437749-25-002138-index.html | 2025-01-29 15:24:31 | |
| 0001437749-25-002138.txt | 2025-01-29 15:24:31 | |
 0001437749-25-002138-xbrl.zip | 114482 | 2025-01-29 15:24:31 |
| belfb-20241114.xsd | 3893 | 2025-01-29 15:24:31 |
| belfb-20241114_def.xml | 14193 | 2025-01-29 15:24:31 |
| belfb-20241114_lab.xml | 18717 | 2025-01-29 15:24:31 |
| belfb-20241114_pre.xml | 14280 | 2025-01-29 15:24:31 |
| belfb20250125c_8ka.htm | 45902 | 2025-01-29 15:24:31 |
| belfb20250125c_8ka_htm.xml | 5056 | 2025-01-29 15:24:31 |
| ex_770398.htm | 3509 | 2025-01-29 15:24:31 |
| ex_770399.htm | 1045419 | 2025-01-29 15:24:31 |
| ex_770400.htm | 544644 | 2025-01-29 15:24:31 |
| ex_770401.htm | 635662 | 2025-01-29 15:24:31 |
| FilingSummary.xml | 1788 | 2025-01-29 15:24:31 |
| Financial_Report.xlsx | 5917 | 2025-01-29 15:24:31 |
| MetaLinks.json | 22720 | 2025-01-29 15:24:31 |
| R1.htm | 45509 | 2025-01-29 15:24:31 |
| report.css | 2767 | 2025-01-29 15:24:31 |
| Show.js | 1085 | 2025-01-29 15:24:31 |