Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-23-018991-index-headers.html | 2023-05-08 18:38:12 | |
| 0000950170-23-018991-index.html | 2023-05-08 18:38:12 | |
| 0000950170-23-018991.txt | 2023-05-08 18:38:12 | |
 0000950170-23-018991-xbrl.zip | 338992 | 2023-05-08 18:38:12 |
| dbb-20230331.htm | 1922596 | 2023-05-08 18:38:12 |
| dbb-20230331.xsd | 40762 | 2023-05-08 18:38:12 |
| dbb-20230331_cal.xml | 38959 | 2023-05-08 18:38:12 |
| dbb-20230331_def.xml | 109293 | 2023-05-08 18:38:12 |
| dbb-20230331_htm.xml | 1321588 | 2023-05-08 18:38:12 |
| dbb-20230331_lab.xml | 294840 | 2023-05-08 18:38:12 |
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| dbb-ex31_2.htm | 18113 | 2023-05-08 18:38:12 |
| dbb-ex32_1.htm | 10748 | 2023-05-08 18:38:12 |
| dbb-ex32_2.htm | 10824 | 2023-05-08 18:38:12 |
| FilingSummary.xml | 25571 | 2023-05-08 18:38:12 |
| Financial_Report.xlsx | 64195 | 2023-05-08 18:38:12 |
 img41110825_0.jpg | 184265 | 2023-05-08 18:38:12 |
 img41110825_1.jpg | 161040 | 2023-05-08 18:38:12 |
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| R10.htm | 31582 | 2023-05-08 18:38:12 |
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| R2.htm | 79850 | 2023-05-08 18:38:12 |
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| R21.htm | 161089 | 2023-05-08 18:38:12 |
| R22.htm | 72065 | 2023-05-08 18:38:12 |
| R23.htm | 128127 | 2023-05-08 18:38:12 |
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| R26.htm | 12417 | 2023-05-08 18:38:12 |
| R27.htm | 10498 | 2023-05-08 18:38:12 |
| R28.htm | 4547 | 2023-05-08 18:38:12 |
| R29.htm | 28633 | 2023-05-08 18:38:12 |
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| R31.htm | 13069 | 2023-05-08 18:38:12 |
| R32.htm | 6629 | 2023-05-08 18:38:12 |
| R33.htm | 16180 | 2023-05-08 18:38:12 |
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| R4.htm | 144241 | 2023-05-08 18:38:12 |
| R5.htm | 27278 | 2023-05-08 18:38:12 |
| R6.htm | 53795 | 2023-05-08 18:38:12 |
| R7.htm | 53890 | 2023-05-08 18:38:12 |
| R8.htm | 58428 | 2023-05-08 18:38:12 |
| R9.htm | 16610 | 2023-05-08 18:38:12 |
| report.css | 2767 | 2023-05-08 18:38:12 |
| Show.js | 1085 | 2023-05-08 18:38:12 |