Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001064728-19-000041-index-headers.html | 2019-10-29 20:23:30 | |
| 0001064728-19-000041-index.html | 2019-10-29 20:23:30 | |
| 0001064728-19-000041.txt | 2019-10-29 20:23:30 | |
 0001064728-19-000041-xbrl.zip | 14287 | 2019-10-29 20:23:30 |
| btu-20191028.xsd | 4592 | 2019-10-29 20:23:30 |
| btu-20191028_cal.xml | 629 | 2019-10-29 20:23:30 |
| btu-20191028_def.xml | 1479 | 2019-10-29 20:23:30 |
| btu-20191028_lab.xml | 26142 | 2019-10-29 20:23:30 |
| btu-20191028_pre.xml | 13585 | 2019-10-29 20:23:30 |
| btu8k20191028.htm | 47283 | 2019-10-29 20:23:30 |
| btu8k20191028_htm.xml | 4497 | 2019-10-29 20:23:30 |
| FilingSummary.xml | 1691 | 2019-10-29 20:23:30 |
| Financial_Report.xlsx | 5787 | 2019-10-29 20:23:30 |
| MetaLinks.json | 18456 | 2019-10-29 20:23:30 |
| R1.htm | 38608 | 2019-10-29 20:23:30 |
| report.css | 2767 | 2019-10-29 20:23:30 |
| Show.js | 1084 | 2019-10-29 20:23:30 |