Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-22-000045-index-headers.html | 2022-05-06 16:15:23 | |
| 0001064728-22-000045-index.html | 2022-05-06 16:15:23 | |
| 0001064728-22-000045.txt | 2022-05-06 16:15:23 | |
 0001064728-22-000045-xbrl.zip | 11249 | 2022-05-06 16:15:23 |
| btu-20220505.htm | 51050 | 2022-05-06 16:15:23 |
| btu-20220505.xsd | 1927 | 2022-05-06 16:15:23 |
| btu-20220505_htm.xml | 11251 | 2022-05-06 16:15:23 |
| btu-20220505_lab.xml | 24137 | 2022-05-06 16:15:23 |
| btu-20220505_pre.xml | 12529 | 2022-05-06 16:15:23 |
| FilingSummary.xml | 1618 | 2022-05-06 16:15:23 |
| Financial_Report.xlsx | 5675 | 2022-05-06 16:15:23 |
| MetaLinks.json | 16728 | 2022-05-06 16:15:23 |
| R1.htm | 38709 | 2022-05-06 16:15:23 |
| report.css | 2766 | 2022-05-06 16:15:23 |
| Show.js | 1084 | 2022-05-06 16:15:23 |