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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Dec. 31, 2019
Income Taxes [Abstract]      
Statutory income tax (benefit) expense 21.00% 21.00%  
Foreign statutory tax rate, foreign operations 25.00% 25.00%  
Gross deferred tax asset     $ 43,945
Valuation allowance     28,632
Net deferred tax asset     15,313
Deferred tax liabilities, gross     8,633
Net operating loss carryforwards for U.S. federal income tax purposes     131,621
Research and experimentation credit carryforwards     $ 4,250