Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-21-000036-index-headers.html | 2021-10-15 16:05:51 | |
| 0001064728-21-000036-index.html | 2021-10-15 16:05:51 | |
| 0001064728-21-000036.txt | 2021-10-15 16:05:51 | |
 0001064728-21-000036-xbrl.zip | 11124 | 2021-10-15 16:05:51 |
| btu-20211011.htm | 35781 | 2021-10-15 16:05:51 |
| btu-20211011.xsd | 1927 | 2021-10-15 16:05:51 |
| btu-20211011_htm.xml | 11222 | 2021-10-15 16:05:51 |
| btu-20211011_lab.xml | 24137 | 2021-10-15 16:05:51 |
| btu-20211011_pre.xml | 12529 | 2021-10-15 16:05:51 |
| FilingSummary.xml | 1607 | 2021-10-15 16:05:51 |
| Financial_Report.xlsx | 5673 | 2021-10-15 16:05:51 |
| MetaLinks.json | 16728 | 2021-10-15 16:05:51 |
| R1.htm | 38578 | 2021-10-15 16:05:51 |
| report.css | 2766 | 2021-10-15 16:05:51 |
| Show.js | 1084 | 2021-10-15 16:05:51 |