Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000768835-23-000112-index-headers.html | 2023-12-06 16:09:25 | |
| 0000768835-23-000112-index.html | 2023-12-06 16:09:25 | |
| 0000768835-23-000112.txt | 2023-12-06 16:09:25 | |
 0000768835-23-000112-xbrl.zip | 196480 | 2023-12-06 16:09:25 |
| big-20231028.htm | 911975 | 2023-12-06 16:09:25 |
| big-20231028.xsd | 42164 | 2023-12-06 16:09:25 |
| big-20231028xex311.htm | 10916 | 2023-12-06 16:09:25 |
| big-20231028xex312.htm | 11425 | 2023-12-06 16:09:25 |
| big-20231028xex321.htm | 5157 | 2023-12-06 16:09:25 |
| big-20231028xex322.htm | 5674 | 2023-12-06 16:09:25 |
| big-20231028_cal.xml | 44956 | 2023-12-06 16:09:25 |
| big-20231028_def.xml | 228212 | 2023-12-06 16:09:25 |
| big-20231028_htm.xml | 555296 | 2023-12-06 16:09:25 |
| big-20231028_lab.xml | 602335 | 2023-12-06 16:09:25 |
| big-20231028_pre.xml | 351517 | 2023-12-06 16:09:25 |
| ex1011-fourthpsaamendment_.htm | 54021 | 2023-12-06 16:09:25 |
| FilingSummary.xml | 23493 | 2023-12-06 16:09:25 |
| Financial_Report.xlsx | 70378 | 2023-12-06 16:09:25 |
| MetaLinks.json | 648218 | 2023-12-06 16:09:25 |
| R1.htm | 51615 | 2023-12-06 16:09:25 |
| R10.htm | 24476 | 2023-12-06 16:09:25 |
| R11.htm | 9006 | 2023-12-06 16:09:25 |
| R12.htm | 26576 | 2023-12-06 16:09:25 |
| R13.htm | 78690 | 2023-12-06 16:09:25 |
| R14.htm | 9628 | 2023-12-06 16:09:25 |
| R15.htm | 6616 | 2023-12-06 16:09:25 |
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| R17.htm | 5477 | 2023-12-06 16:09:25 |
| R18.htm | 9734 | 2023-12-06 16:09:25 |
| R19.htm | 15397 | 2023-12-06 16:09:25 |
| R2.htm | 78437 | 2023-12-06 16:09:25 |
| R20.htm | 12517 | 2023-12-06 16:09:25 |
| R21.htm | 36621 | 2023-12-06 16:09:25 |
| R22.htm | 24226 | 2023-12-06 16:09:25 |
| R23.htm | 15022 | 2023-12-06 16:09:25 |
| R24.htm | 78373 | 2023-12-06 16:09:25 |
| R25.htm | 26099 | 2023-12-06 16:09:25 |
| R26.htm | 35419 | 2023-12-06 16:09:25 |
| R27.htm | 26909 | 2023-12-06 16:09:25 |
| R28.htm | 32770 | 2023-12-06 16:09:25 |
| R29.htm | 35537 | 2023-12-06 16:09:25 |
| R3.htm | 96591 | 2023-12-06 16:09:25 |
| R30.htm | 8344 | 2023-12-06 16:09:25 |
| R31.htm | 12554 | 2023-12-06 16:09:25 |
| R32.htm | 21104 | 2023-12-06 16:09:25 |
| R33.htm | 8894 | 2023-12-06 16:09:25 |
| R34.htm | 110276 | 2023-12-06 16:09:25 |
| R35.htm | 8866 | 2023-12-06 16:09:25 |
| R36.htm | 6896 | 2023-12-06 16:09:25 |
| R37.htm | 23642 | 2023-12-06 16:09:25 |
| R38.htm | 5862 | 2023-12-06 16:09:25 |
| R39.htm | 32086 | 2023-12-06 16:09:25 |
| R4.htm | 20844 | 2023-12-06 16:09:25 |
| R5.htm | 77620 | 2023-12-06 16:09:25 |
| R6.htm | 4753 | 2023-12-06 16:09:25 |
| R7.htm | 86824 | 2023-12-06 16:09:25 |
| R8.htm | 20809 | 2023-12-06 16:09:25 |
| R9.htm | 45896 | 2023-12-06 16:09:25 |
| report.css | 2767 | 2023-12-06 16:09:25 |
| Show.js | 1085 | 2023-12-06 16:09:25 |