Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001140361-21-017484-index-headers.html | 2021-05-14 17:44:40 | |
| 0001140361-21-017484-index.html | 2021-05-14 17:44:40 | |
| 0001140361-21-017484.txt | 2021-05-14 17:44:40 | |
 0001140361-21-017484-xbrl.zip | 482362 | 2021-05-14 17:44:40 |
| brhc10024536_20f.htm | 4178295 | 2021-05-14 17:44:40 |
| brhc10024536_ex12-1.htm | 8138 | 2021-05-14 17:44:40 |
| brhc10024536_ex12-2.htm | 8158 | 2021-05-14 17:44:40 |
| brhc10024536_ex13-1.htm | 4439 | 2021-05-14 17:44:40 |
| brhc10024536_ex13-2.htm | 4503 | 2021-05-14 17:44:40 |
| brhc10024536_ex2-5.htm | 76826 | 2021-05-14 17:44:40 |
| brhc10024536_ex8-1.htm | 9743 | 2021-05-14 17:44:40 |
| FilingSummary.xml | 68712 | 2021-05-14 17:44:40 |
| Financial_Report.xlsx | 205469 | 2021-05-14 17:44:40 |
| gtmay-20201231.xml | 4801819 | 2021-05-14 17:44:40 |
| gtmay-20201231.xsd | 150892 | 2021-05-14 17:44:40 |
| gtmay-20201231_cal.xml | 129577 | 2021-05-14 17:44:40 |
| gtmay-20201231_def.xml | 613671 | 2021-05-14 17:44:40 |
| gtmay-20201231_lab.xml | 1590548 | 2021-05-14 17:44:40 |
| gtmay-20201231_pre.xml | 899494 | 2021-05-14 17:44:40 |
 image0.jpg | 68010 | 2021-05-14 17:44:40 |
| R1.htm | 38625 | 2021-05-14 17:44:40 |
| R10.htm | 10212 | 2021-05-14 17:44:40 |
| R100.htm | 15575 | 2021-05-14 17:44:40 |
| R101.htm | 34129 | 2021-05-14 17:44:40 |
| R102.htm | 19417 | 2021-05-14 17:44:40 |
| R103.htm | 20813 | 2021-05-14 17:44:40 |
| R104.htm | 30080 | 2021-05-14 17:44:40 |
| R105.htm | 4695 | 2021-05-14 17:44:40 |
| R106.htm | 16088 | 2021-05-14 17:44:40 |
| R107.htm | 13962 | 2021-05-14 17:44:40 |
| R108.htm | 31458 | 2021-05-14 17:44:40 |
| R109.htm | 48162 | 2021-05-14 17:44:40 |
| R11.htm | 70215 | 2021-05-14 17:44:40 |
| R110.htm | 29160 | 2021-05-14 17:44:40 |
| R111.htm | 16544 | 2021-05-14 17:44:40 |
| R112.htm | 30852 | 2021-05-14 17:44:40 |
| R113.htm | 30835 | 2021-05-14 17:44:40 |
| R114.htm | 18057 | 2021-05-14 17:44:40 |
| R115.htm | 4068 | 2021-05-14 17:44:40 |
| R116.htm | 12276 | 2021-05-14 17:44:40 |
| R117.htm | 4056 | 2021-05-14 17:44:40 |
| R12.htm | 63078 | 2021-05-14 17:44:40 |
| R13.htm | 12429 | 2021-05-14 17:44:40 |
| R14.htm | 41068 | 2021-05-14 17:44:40 |
| R15.htm | 18389 | 2021-05-14 17:44:40 |
| R16.htm | 137490 | 2021-05-14 17:44:40 |
| R17.htm | 179552 | 2021-05-14 17:44:40 |
| R18.htm | 18050 | 2021-05-14 17:44:40 |
| R19.htm | 36653 | 2021-05-14 17:44:40 |
| R2.htm | 91874 | 2021-05-14 17:44:40 |
| R20.htm | 14597 | 2021-05-14 17:44:40 |
| R21.htm | 214622 | 2021-05-14 17:44:40 |
| R22.htm | 48975 | 2021-05-14 17:44:40 |
| R23.htm | 15542 | 2021-05-14 17:44:40 |
| R24.htm | 81369 | 2021-05-14 17:44:40 |
| R25.htm | 36711 | 2021-05-14 17:44:40 |
| R26.htm | 21511 | 2021-05-14 17:44:40 |
| R27.htm | 15902 | 2021-05-14 17:44:40 |
| R28.htm | 67178 | 2021-05-14 17:44:40 |
| R29.htm | 234473 | 2021-05-14 17:44:40 |
| R3.htm | 7779 | 2021-05-14 17:44:40 |
| R30.htm | 110333 | 2021-05-14 17:44:40 |
| R31.htm | 4984 | 2021-05-14 17:44:40 |
| R32.htm | 44098 | 2021-05-14 17:44:40 |
| R33.htm | 104147 | 2021-05-14 17:44:40 |
| R34.htm | 19810 | 2021-05-14 17:44:40 |
| R35.htm | 14223 | 2021-05-14 17:44:40 |
| R36.htm | 6403 | 2021-05-14 17:44:40 |
| R37.htm | 5430 | 2021-05-14 17:44:40 |
| R38.htm | 107979 | 2021-05-14 17:44:40 |
| R39.htm | 39163 | 2021-05-14 17:44:40 |
| R4.htm | 62435 | 2021-05-14 17:44:40 |
| R40.htm | 6895 | 2021-05-14 17:44:40 |
| R41.htm | 60843 | 2021-05-14 17:44:40 |
| R42.htm | 11266 | 2021-05-14 17:44:40 |
| R43.htm | 42118 | 2021-05-14 17:44:40 |
| R44.htm | 18031 | 2021-05-14 17:44:40 |
| R45.htm | 137807 | 2021-05-14 17:44:40 |
| R46.htm | 184528 | 2021-05-14 17:44:40 |
| R47.htm | 17341 | 2021-05-14 17:44:40 |
| R48.htm | 36228 | 2021-05-14 17:44:40 |
| R49.htm | 10597 | 2021-05-14 17:44:40 |
| R5.htm | 30266 | 2021-05-14 17:44:40 |
| R50.htm | 243738 | 2021-05-14 17:44:40 |
| R51.htm | 50424 | 2021-05-14 17:44:40 |
| R52.htm | 14773 | 2021-05-14 17:44:40 |
| R53.htm | 78093 | 2021-05-14 17:44:40 |
| R54.htm | 36160 | 2021-05-14 17:44:40 |
| R55.htm | 21127 | 2021-05-14 17:44:40 |
| R56.htm | 15334 | 2021-05-14 17:44:40 |
| R57.htm | 71014 | 2021-05-14 17:44:40 |
| R58.htm | 233148 | 2021-05-14 17:44:40 |
| R59.htm | 114893 | 2021-05-14 17:44:40 |
| R6.htm | 30413 | 2021-05-14 17:44:40 |
| R60.htm | 43137 | 2021-05-14 17:44:40 |
| R61.htm | 106200 | 2021-05-14 17:44:40 |
| R62.htm | 18098 | 2021-05-14 17:44:40 |
| R63.htm | 18982 | 2021-05-14 17:44:40 |
| R64.htm | 52643 | 2021-05-14 17:44:40 |
| R65.htm | 13331 | 2021-05-14 17:44:40 |
| R66.htm | 61319 | 2021-05-14 17:44:40 |
| R67.htm | 17358 | 2021-05-14 17:44:40 |
| R68.htm | 92642 | 2021-05-14 17:44:40 |
| R69.htm | 13428 | 2021-05-14 17:44:40 |
| R7.htm | 79790 | 2021-05-14 17:44:40 |
| R70.htm | 17845 | 2021-05-14 17:44:40 |
| R71.htm | 38013 | 2021-05-14 17:44:40 |
| R72.htm | 11186 | 2021-05-14 17:44:40 |
| R73.htm | 18865 | 2021-05-14 17:44:40 |
| R74.htm | 121120 | 2021-05-14 17:44:40 |
| R75.htm | 18313 | 2021-05-14 17:44:40 |
| R76.htm | 64461 | 2021-05-14 17:44:40 |
| R77.htm | 19572 | 2021-05-14 17:44:40 |
| R78.htm | 32778 | 2021-05-14 17:44:40 |
| R79.htm | 35910 | 2021-05-14 17:44:40 |
| R8.htm | 55444 | 2021-05-14 17:44:40 |
| R80.htm | 30540 | 2021-05-14 17:44:40 |
| R81.htm | 36118 | 2021-05-14 17:44:40 |
| R82.htm | 25691 | 2021-05-14 17:44:40 |
| R83.htm | 41621 | 2021-05-14 17:44:40 |
| R84.htm | 281613 | 2021-05-14 17:44:40 |
| R85.htm | 20513 | 2021-05-14 17:44:40 |
| R86.htm | 44059 | 2021-05-14 17:44:40 |
| R87.htm | 15691 | 2021-05-14 17:44:40 |
| R88.htm | 23741 | 2021-05-14 17:44:40 |
| R89.htm | 59472 | 2021-05-14 17:44:40 |
| R9.htm | 6530 | 2021-05-14 17:44:40 |
| R90.htm | 30754 | 2021-05-14 17:44:40 |
| R91.htm | 18184 | 2021-05-14 17:44:40 |
| R92.htm | 12084 | 2021-05-14 17:44:40 |
| R93.htm | 28231 | 2021-05-14 17:44:40 |
| R94.htm | 38617 | 2021-05-14 17:44:40 |
| R95.htm | 11835 | 2021-05-14 17:44:40 |
| R96.htm | 30681 | 2021-05-14 17:44:40 |
| R97.htm | 55710 | 2021-05-14 17:44:40 |
| R98.htm | 23834 | 2021-05-14 17:44:40 |
| R99.htm | 13974 | 2021-05-14 17:44:40 |
| report.css | 2768 | 2021-05-14 17:44:40 |
| Show.js | 1086 | 2021-05-14 17:44:40 |