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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies |
Schedule of original maturities of deferred revenue | ​
​ | ​ | ​ | ​
Year ending December 31, |  | ​ | ​
2021 | ​ | $ | 1,679,813
2022 | ​ | ​ | 394,925
2023 | ​ |  | 24,593
Total | ​ | $ | 2,099,331

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- Definition Tabular disclosure of information about obligations resulting from other commitments. + References No definition available. + Details
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