Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-21-000033-index-headers.html | 2021-10-01 08:04:55 | |
| 0001064728-21-000033-index.html | 2021-10-01 08:04:55 | |
| 0001064728-21-000033.txt | 2021-10-01 08:04:55 | |
 0001064728-21-000033-xbrl.zip | 10587 | 2021-10-01 08:04:55 |
| btu-20211001.htm | 33473 | 2021-10-01 08:04:55 |
| btu-20211001.xsd | 1927 | 2021-10-01 08:04:55 |
| btu-20211001_htm.xml | 11222 | 2021-10-01 08:04:55 |
| btu-20211001_lab.xml | 24137 | 2021-10-01 08:04:55 |
| btu-20211001_pre.xml | 12529 | 2021-10-01 08:04:55 |
| FilingSummary.xml | 1607 | 2021-10-01 08:04:55 |
| Financial_Report.xlsx | 5674 | 2021-10-01 08:04:55 |
| MetaLinks.json | 16728 | 2021-10-01 08:04:55 |
| R1.htm | 38579 | 2021-10-01 08:04:55 |
| report.css | 2766 | 2021-10-01 08:04:55 |
| Show.js | 1084 | 2021-10-01 08:04:55 |