Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-21-014093-index-headers.html | 2021-11-02 16:08:52 | |
| 0001558370-21-014093-index.html | 2021-11-02 16:08:52 | |
| 0001558370-21-014093.txt | 2021-11-02 16:08:52 | |
 0001558370-21-014093-xbrl.zip | 170898 | 2021-11-02 16:08:52 |
| FilingSummary.xml | 27268 | 2021-11-02 16:08:52 |
| Financial_Report.xlsx | 54842 | 2021-11-02 16:08:52 |
| MetaLinks.json | 473304 | 2021-11-02 16:08:52 |
| metc-20210930.xsd | 39886 | 2021-11-02 16:08:52 |
| metc-20210930x10q.htm | 1434833 | 2021-11-02 16:08:52 |
| metc-20210930x10q_htm.xml | 804010 | 2021-11-02 16:08:52 |
| metc-20210930xex31d1.htm | 16203 | 2021-11-02 16:08:52 |
| metc-20210930xex31d2.htm | 15971 | 2021-11-02 16:08:52 |
| metc-20210930xex32d1.htm | 6931 | 2021-11-02 16:08:52 |
| metc-20210930xex32d2.htm | 6908 | 2021-11-02 16:08:52 |
| metc-20210930xex95d1.htm | 156362 | 2021-11-02 16:08:52 |
| metc-20210930_cal.xml | 52860 | 2021-11-02 16:08:52 |
| metc-20210930_def.xml | 129500 | 2021-11-02 16:08:52 |
| metc-20210930_lab.xml | 338371 | 2021-11-02 16:08:52 |
| metc-20210930_pre.xml | 252437 | 2021-11-02 16:08:52 |
| R1.htm | 54128 | 2021-11-02 16:08:52 |
| R10.htm | 15343 | 2021-11-02 16:08:52 |
| R11.htm | 75911 | 2021-11-02 16:08:52 |
| R12.htm | 6208 | 2021-11-02 16:08:52 |
| R13.htm | 21662 | 2021-11-02 16:08:52 |
| R14.htm | 8775 | 2021-11-02 16:08:52 |
| R15.htm | 32808 | 2021-11-02 16:08:52 |
| R16.htm | 34425 | 2021-11-02 16:08:52 |
| R17.htm | 49445 | 2021-11-02 16:08:52 |
| R18.htm | 10027 | 2021-11-02 16:08:52 |
| R19.htm | 8615 | 2021-11-02 16:08:52 |
| R2.htm | 104963 | 2021-11-02 16:08:52 |
| R20.htm | 22017 | 2021-11-02 16:08:52 |
| R21.htm | 52445 | 2021-11-02 16:08:52 |
| R22.htm | 76670 | 2021-11-02 16:08:52 |
| R23.htm | 18125 | 2021-11-02 16:08:52 |
| R24.htm | 28784 | 2021-11-02 16:08:52 |
| R25.htm | 48360 | 2021-11-02 16:08:52 |
| R26.htm | 31133 | 2021-11-02 16:08:52 |
| R27.htm | 7119 | 2021-11-02 16:08:52 |
| R28.htm | 6948 | 2021-11-02 16:08:52 |
| R29.htm | 18566 | 2021-11-02 16:08:52 |
| R3.htm | 19696 | 2021-11-02 16:08:52 |
| R30.htm | 20693 | 2021-11-02 16:08:52 |
| R31.htm | 12415 | 2021-11-02 16:08:52 |
| R32.htm | 69569 | 2021-11-02 16:08:52 |
| R33.htm | 26200 | 2021-11-02 16:08:52 |
| R34.htm | 52296 | 2021-11-02 16:08:52 |
| R35.htm | 7543 | 2021-11-02 16:08:52 |
| R36.htm | 39392 | 2021-11-02 16:08:52 |
| R37.htm | 21165 | 2021-11-02 16:08:52 |
| R38.htm | 16067 | 2021-11-02 16:08:52 |
| R39.htm | 22061 | 2021-11-02 16:08:52 |
| R4.htm | 72045 | 2021-11-02 16:08:52 |
| R40.htm | 19583 | 2021-11-02 16:08:52 |
| R41.htm | 40180 | 2021-11-02 16:08:52 |
| R42.htm | 18884 | 2021-11-02 16:08:52 |
| R43.htm | 14788 | 2021-11-02 16:08:52 |
| R5.htm | 33429 | 2021-11-02 16:08:52 |
| R6.htm | 87003 | 2021-11-02 16:08:52 |
| R7.htm | 7452 | 2021-11-02 16:08:52 |
| R8.htm | 12376 | 2021-11-02 16:08:52 |
| R9.htm | 52623 | 2021-11-02 16:08:52 |
| report.css | 2767 | 2021-11-02 16:08:52 |
| Show.js | 1085 | 2021-11-02 16:08:52 |