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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Intangible asset activity        
Net balance     $ 27,196  
Additions     17  
Disposals-Other     (21)  
Net foreign currency translation     (75)  
Amortization expense $ (1,396) $ (2,360) (4,503) $ (7,049)
Net balance 22,614   22,614  
Intangible assets, net        
Balance at cost 96,356   96,356  
Accumulated amortization (73,742)   (73,742)  
Total intangible assets 22,614   22,614  
Impairment charges     0 $ 0
Capitalized Technology [Member]        
Intangible asset activity        
Net balance     2,277  
Additions     3  
Amortization expense     (1,164)  
Net balance 1,116   1,116  
Intangible assets, net        
Balance at cost 43,046   43,046  
Accumulated amortization (41,930)   (41,930)  
Total intangible assets 1,116   1,116  
Customer Relationships [Member]        
Intangible asset activity        
Net balance     23,200  
Net foreign currency translation     (70)  
Amortization expense     (3,003)  
Net balance 20,127   20,127  
Intangible assets, net        
Balance at cost 39,764   39,764  
Accumulated amortization (19,637)   (19,637)  
Total intangible assets 20,127   20,127  
Other [Member]        
Intangible asset activity        
Net balance     1,719  
Additions     14  
Disposals-Other     (21)  
Net foreign currency translation     (5)  
Amortization expense     (336)  
Net balance 1,371   1,371  
Intangible assets, net        
Balance at cost 13,546   13,546  
Accumulated amortization (12,175)   (12,175)  
Total intangible assets $ 1,371   $ 1,371