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Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Taxes (Details) [Line Items]    
Income tax expense $ 456 $ 738
Valuation allowance 17,934 $ 15,265
Unrepatriated earnings balance 972  
Effective tax liability 49  
Federal net operating loss 212,867  
Interest and penalties $ 474  
Operating loss credits description The Company’s tax years 2006 to 2021 will remain open for examination by the federal and state authorities for three and four years, respectively, from the date of utilization of any net operating loss credits.  
Maximum [Member]    
Income Taxes (Details) [Line Items]    
Net operating loss $ 301,503  
Federal and state net operating loss expire year 2028  
Research and development credit carry forwards $ 8,900  
Minimum [Member]    
Income Taxes (Details) [Line Items]    
Net operating loss $ 102,925  
Federal and state net operating loss expire year 2025  
Research and development credit carry forwards $ 7,993  
Canada [Member]    
Income Taxes (Details) [Line Items]    
Foreign earnings balances $ 972  
Reduced dividends 5.00%  
China [Member]    
Income Taxes (Details) [Line Items]    
Foreign earnings balances $ 0  
Germany [Member]    
Income Taxes (Details) [Line Items]    
Foreign earnings balances $ 5,681  
Reduced dividends 0.00%  
Net operating loss $ 3,383  
Japan [Member]    
Income Taxes (Details) [Line Items]    
Foreign earnings balances $ 159  
Reduced dividends 0.00%  
Korea [Member]    
Income Taxes (Details) [Line Items]    
Foreign earnings balances $ 0