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| 0001213900-20-009053-index.html | 2020-04-13 16:06:28 | |
| 0001213900-20-009053.txt | 2020-04-13 16:06:28 | |
 0001213900-20-009053-xbrl.zip | 131528 | 2020-04-13 16:06:28 |
| bdr-20191231.xml | 685976 | 2020-04-13 16:06:28 |
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| f10k2019_blondertongue.htm | 708002 | 2020-04-13 16:06:28 |
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| Financial_Report.xlsx | 79966 | 2020-04-13 16:06:28 |
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| report.css | 2767 | 2020-04-13 16:06:28 |
| Show.js | 1085 | 2020-04-13 16:06:28 |