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| 0001064728-23-000175-index.html | 2023-12-08 16:05:24 | |
| 0001064728-23-000175.txt | 2023-12-08 16:05:24 | |
 0001064728-23-000175-xbrl.zip | 36297 | 2023-12-08 16:05:24 |
| btu-20231204.htm | 31176 | 2023-12-08 16:05:24 |
| btu-20231204.xsd | 1929 | 2023-12-08 16:05:24 |
| btu-20231204_htm.xml | 2820 | 2023-12-08 16:05:24 |
| btu-20231204_lab.xml | 25140 | 2023-12-08 16:05:24 |
| btu-20231204_pre.xml | 13066 | 2023-12-08 16:05:24 |
| btu20231204exh31amdbylaws.htm | 151393 | 2023-12-08 16:05:24 |
| FilingSummary.xml | 1635 | 2023-12-08 16:05:24 |
| Financial_Report.xlsx | 5725 | 2023-12-08 16:05:24 |
| MetaLinks.json | 17697 | 2023-12-08 16:05:24 |
| R1.htm | 39613 | 2023-12-08 16:05:24 |
| report.css | 2767 | 2023-12-08 16:05:24 |
| Show.js | 1084 | 2023-12-08 16:05:24 |