Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000768835-24-000049-index-headers.html | 2024-06-13 16:14:13 | |
| 0000768835-24-000049-index.html | 2024-06-13 16:14:13 | |
| 0000768835-24-000049.txt | 2024-06-13 16:14:13 | |
 0000768835-24-000049-xbrl.zip | 404910 | 2024-06-13 16:14:13 |
| big-20240504.htm | 695770 | 2024-06-13 16:14:13 |
| big-20240504.xsd | 45332 | 2024-06-13 16:14:13 |
| big-20240504_cal.xml | 48206 | 2024-06-13 16:14:13 |
| big-20240504_def.xml | 227951 | 2024-06-13 16:14:13 |
| big-20240504_htm.xml | 381039 | 2024-06-13 16:14:13 |
| big-20240504_lab.xml | 568439 | 2024-06-13 16:14:13 |
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| big-202454xex101.htm | 1816813 | 2024-06-13 16:14:13 |
| big-202454xex102.htm | 107635 | 2024-06-13 16:14:13 |
| big-202454xex311.htm | 10911 | 2024-06-13 16:14:13 |
| big-202454xex312.htm | 11420 | 2024-06-13 16:14:13 |
| big-202454xex321.htm | 5147 | 2024-06-13 16:14:13 |
| big-202454xex322.htm | 5664 | 2024-06-13 16:14:13 |
| FilingSummary.xml | 24290 | 2024-06-13 16:14:13 |
| Financial_Report.xlsx | 61532 | 2024-06-13 16:14:13 |
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| R1.htm | 51619 | 2024-06-13 16:14:13 |
| R10.htm | 37530 | 2024-06-13 16:14:13 |
| R11.htm | 8870 | 2024-06-13 16:14:13 |
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| R18.htm | 6858 | 2024-06-13 16:14:13 |
| R19.htm | 15087 | 2024-06-13 16:14:13 |
| R2.htm | 76547 | 2024-06-13 16:14:13 |
| R20.htm | 4621 | 2024-06-13 16:14:13 |
| R21.htm | 36939 | 2024-06-13 16:14:13 |
| R22.htm | 26885 | 2024-06-13 16:14:13 |
| R23.htm | 12170 | 2024-06-13 16:14:13 |
| R24.htm | 50561 | 2024-06-13 16:14:13 |
| R25.htm | 15476 | 2024-06-13 16:14:13 |
| R26.htm | 25425 | 2024-06-13 16:14:13 |
| R27.htm | 27273 | 2024-06-13 16:14:13 |
| R28.htm | 25955 | 2024-06-13 16:14:13 |
| R29.htm | 54356 | 2024-06-13 16:14:13 |
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| R30.htm | 8348 | 2024-06-13 16:14:13 |
| R31.htm | 10168 | 2024-06-13 16:14:13 |
| R32.htm | 20452 | 2024-06-13 16:14:13 |
| R33.htm | 7975 | 2024-06-13 16:14:13 |
| R34.htm | 87531 | 2024-06-13 16:14:13 |
| R35.htm | 10341 | 2024-06-13 16:14:13 |
| R36.htm | 19483 | 2024-06-13 16:14:13 |
| R37.htm | 6039 | 2024-06-13 16:14:13 |
| R38.htm | 15611 | 2024-06-13 16:14:13 |
| R4.htm | 20848 | 2024-06-13 16:14:13 |
| R5.htm | 56926 | 2024-06-13 16:14:13 |
| R6.htm | 4448 | 2024-06-13 16:14:13 |
| R7.htm | 83078 | 2024-06-13 16:14:13 |
| R8.htm | 20916 | 2024-06-13 16:14:13 |
| R9.htm | 10859 | 2024-06-13 16:14:13 |
| report.css | 2767 | 2024-06-13 16:14:13 |
| Show.js | 1085 | 2024-06-13 16:14:13 |