Parent Directory| Name | Size | Last Modified |
|---|---|---|
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| 0000768835-18-000105-index.html | 2018-12-12 16:19:25 | |
| 0000768835-18-000105.txt | 2018-12-12 16:19:25 | |
 0000768835-18-000105-xbrl.zip | 149633 | 2018-12-12 16:19:25 |
| big-20181103.xml | 793353 | 2018-12-12 16:19:25 |
| big-20181103.xsd | 31599 | 2018-12-12 16:19:25 |
| big-20181103x10q.htm | 831878 | 2018-12-12 16:19:25 |
| big-20181103xex101.htm | 41522 | 2018-12-12 16:19:25 |
| big-20181103xex104.htm | 2030115 | 2018-12-12 16:19:25 |
| big-20181103xex311.htm | 15770 | 2018-12-12 16:19:25 |
| big-20181103xex312.htm | 14962 | 2018-12-12 16:19:25 |
| big-20181103xex321.htm | 8686 | 2018-12-12 16:19:25 |
| big-20181103xex322.htm | 7575 | 2018-12-12 16:19:25 |
| big-20181103_cal.xml | 59853 | 2018-12-12 16:19:25 |
| big-20181103_def.xml | 265122 | 2018-12-12 16:19:25 |
| big-20181103_lab.xml | 538883 | 2018-12-12 16:19:25 |
| big-20181103_pre.xml | 312800 | 2018-12-12 16:19:25 |
| FilingSummary.xml | 21618 | 2018-12-12 16:19:25 |
| Financial_Report.xlsx | 47302 | 2018-12-12 16:19:25 |
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| R9.htm | 9548 | 2018-12-12 16:19:25 |
| report.css | 2767 | 2018-12-12 16:19:25 |
| Show.js | 1085 | 2018-12-12 16:19:25 |