Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-22-000039-index-headers.html | 2022-05-03 16:16:14 | |
| 0001064728-22-000039-index.html | 2022-05-03 16:16:14 | |
| 0001064728-22-000039.txt | 2022-05-03 16:16:14 | |
 0001064728-22-000039-xbrl.zip | 10695 | 2022-05-03 16:16:14 |
| btu-20220428.htm | 33603 | 2022-05-03 16:16:14 |
| btu-20220428.xsd | 1927 | 2022-05-03 16:16:14 |
| btu-20220428_htm.xml | 11251 | 2022-05-03 16:16:14 |
| btu-20220428_lab.xml | 24137 | 2022-05-03 16:16:14 |
| btu-20220428_pre.xml | 12529 | 2022-05-03 16:16:14 |
| FilingSummary.xml | 1618 | 2022-05-03 16:16:14 |
| Financial_Report.xlsx | 5674 | 2022-05-03 16:16:14 |
| MetaLinks.json | 16728 | 2022-05-03 16:16:14 |
| R1.htm | 38710 | 2022-05-03 16:16:14 |
| report.css | 2766 | 2022-05-03 16:16:14 |
| Show.js | 1084 | 2022-05-03 16:16:14 |