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Income Taxes - Tax Rate Reconciliation (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Income Taxes        
Federal income tax expense at statutory rate   21.00% 21.00%  
Effect of:        
Change in valuation allowance 101.10% (78.50%)    
Tax effects of foreign operations     35.40% 242.70%
Change in rates     20.60% 0.00%
Foreign operations permanent difference - foreign exchange gains and losses     9.10% 144.30%
Return to provision true up     3.20% (50.60%)
State income tax net of federal benefit     1.50% 16.20%
Withholding tax     0.00% 9.30%
Foreign rate differential     (19.60%) (34.70%)
Effect of stock based compensation     (62.10%) 0.00%
Increase (decrease) in unrecognized tax benefits (ASC 740)     (64.40%) 67.10%
Other     5.40% (23.10%)
Effective tax rate     51.20% 313.70%