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| 0000891014-20-000057-index.html | 2020-10-30 16:30:52 | |
| 0000891014-20-000057.txt | 2020-10-30 16:30:52 | |
 0000891014-20-000057-xbrl.zip | 249162 | 2020-10-30 16:30:52 |
| ex15.htm | 2395 | 2020-10-30 16:30:52 |
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| Financial_Report.xlsx | 81824 | 2020-10-30 16:30:52 |
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| mtx-20200927.xsd | 44272 | 2020-10-30 16:30:52 |
| mtx-20200927_cal.xml | 69402 | 2020-10-30 16:30:52 |
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| report.css | 2767 | 2020-10-30 16:30:52 |
| Show.js | 1085 | 2020-10-30 16:30:52 |