Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Income Taxes [Abstract]      
Statutory income tax (benefit) expense   21.00%  
Estimated effective tax rate 7.80% (2.90%)  
Foreign statutory tax rate, foreign operations 25.00% 25.00%  
Gross deferred tax asset     $ 40,538
Valuation allowance     22,348
Net deferred tax asset     18,190
Deferred tax liabilities, gross     8,304
Net operating loss carryforwards for U.S. federal income tax purposes     120,309
Research and experimentation credit carryforwards     $ 1,889