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|---|---|---|
 0001437749-19-009004-index-headers.html | 2019-05-07 16:48:17 | |
| 0001437749-19-009004-index.html | 2019-05-07 16:48:17 | |
| 0001437749-19-009004.txt | 2019-05-07 16:48:17 | |
 0001437749-19-009004-xbrl.zip | 64775 | 2019-05-07 16:48:17 |
| ex_142530.htm | 14429 | 2019-05-07 16:48:17 |
| ex_142531.htm | 14558 | 2019-05-07 16:48:17 |
| ex_142532.htm | 5318 | 2019-05-07 16:48:17 |
| ex_142533.htm | 5373 | 2019-05-07 16:48:17 |
| ex_142534.htm | 71651 | 2019-05-07 16:48:17 |
| FilingSummary.xml | 21716 | 2019-05-07 16:48:17 |
| Financial_Report.xlsx | 33572 | 2019-05-07 16:48:17 |
| metc-20190331.xml | 288951 | 2019-05-07 16:48:17 |
| metc-20190331.xsd | 28949 | 2019-05-07 16:48:17 |
| metc-20190331_cal.xml | 29197 | 2019-05-07 16:48:17 |
| metc-20190331_def.xml | 223513 | 2019-05-07 16:48:17 |
| metc-20190331_lab.xml | 189918 | 2019-05-07 16:48:17 |
| metc-20190331_pre.xml | 238362 | 2019-05-07 16:48:17 |
| metc20190331_10q.htm | 527382 | 2019-05-07 16:48:17 |
| R1.htm | 29544 | 2019-05-07 16:48:17 |
| R10.htm | 11929 | 2019-05-07 16:48:17 |
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| R8.htm | 19900 | 2019-05-07 16:48:17 |
| R9.htm | 19929 | 2019-05-07 16:48:17 |
| report.css | 2767 | 2019-05-07 16:48:17 |
| Show.js | 1085 | 2019-05-07 16:48:17 |