Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-22-000002-index-headers.html | 2022-01-31 16:36:24 | |
| 0001064728-22-000002-index.html | 2022-01-31 16:36:24 | |
| 0001064728-22-000002.txt | 2022-01-31 16:36:24 | |
 0001064728-22-000002-xbrl.zip | 14648 | 2022-01-31 16:36:24 |
| btu-20220128.htm | 36424 | 2022-01-31 16:36:24 |
| btu-20220128.xsd | 1927 | 2022-01-31 16:36:24 |
| btu-20220128_htm.xml | 11222 | 2022-01-31 16:36:24 |
| btu-20220128_lab.xml | 24137 | 2022-01-31 16:36:24 |
| btu-20220128_pre.xml | 12529 | 2022-01-31 16:36:24 |
| btu8k20220128_ex101.htm | 26497 | 2022-01-31 16:36:24 |
| FilingSummary.xml | 1662 | 2022-01-31 16:36:24 |
| Financial_Report.xlsx | 5674 | 2022-01-31 16:36:24 |
| MetaLinks.json | 16729 | 2022-01-31 16:36:24 |
| R1.htm | 38580 | 2022-01-31 16:36:24 |
| report.css | 2767 | 2022-01-31 16:36:24 |
| Show.js | 1084 | 2022-01-31 16:36:24 |