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v3.23.3

OTHER EXPENSES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Other Expenses |
Schedule of other expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | January 1 – |  | January 1 – |  | January 1 –
​ | ​ | December 31, | ​ | December 31, | ​ | December 31,
​ | ​ | 2022 | ​ | 2021 | ​ | 2020
Lawsuit provision expense | ​ | 175,209 | ​ | 35,201 | ​ | 10,281
Customs tax penalty expense |  | 103,714 |  | — |  | —
Customs tax provision expense |  | 78,232 |  | 591,982 |  | —
Donations and grant |  | 7,857 |  | 91,299 |  | 203,654
Tax base increase |  | — |  | 85,448 |  | —
Other |  | 34,112 |  | 78,197 |  | 15,734
Total |  | 399,124 |  | 882,127 |  | 229,669
​

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- Definition Tabular disclosure of other expenses. + References No definition available. + Details
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Namespace Prefix: | mrt_
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration