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Related Party Transactions (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2018
Related Party Transaction          
Accounts receivable due from related party $ 10,000   $ 10,000   $ 5,800
Noncontrolling Common Stockholder          
Related Party Transaction          
Accounts receivable due from related party 20   20   38
Accounts payable to related party 213   213   272
Noncontrolling Common Stockholder | Research and development          
Related Party Transaction          
Related party transaction expenses   $ (1)   $ (21)  
Noncontrolling Common Stockholder | Sale of Products          
Related Party Transaction          
Licensing revenue from a related party (27) (37) (40) (158)  
Noncontrolling Common Stockholder | License Maintenance Fee          
Related Party Transaction          
Related party transaction expenses (50) (50) (100) (100)  
Common Stockholder          
Related Party Transaction          
Accounts receivable due from related party 394   394    
Common Stockholder | Reimbursement for research and development          
Related Party Transaction          
Licensing revenue from a related party (231)   (408)    
Common Stockholder | Sale of Products          
Related Party Transaction          
Licensing revenue from a related party (359)   (703)    
Common Stockholder | License Maintenance Fee          
Related Party Transaction          
Reduction in license maintenance fees 38   75    
Common Stockholder | License Fee Income          
Related Party Transaction          
Licensing revenue from a related party (5,100)   (5,100)    
Common Stockholder | Interest Expense          
Related Party Transaction          
Related party transaction expenses (151)   (303)    
Common Stockholder | Other Receivable          
Related Party Transaction          
Accounts receivable due from related party 230   230    
Convertible Preferred Stockholder          
Related Party Transaction          
Licensing revenue from a related party   (109)   (115)  
Accounts receivable due from related party         426
Convertible Preferred Stockholder | License Fee Income          
Related Party Transaction          
Licensing revenue from a related party   (37)   (75)  
Convertible Preferred Stockholder | Interest Expense          
Related Party Transaction          
Related party transaction expenses   (152)   (302)  
Corporate Joint Venture          
Related Party Transaction          
Accounts receivable due from related party 9,300   9,300   $ 5,300
Corporate Joint Venture | Related Party Services          
Related Party Transaction          
Related party transaction expenses (56) (39) (167) (98)  
Corporate Joint Venture | Research and development          
Related Party Transaction          
Related party transaction expenses (408) (71) (653) (203)  
Corporate Joint Venture | Reimbursement for research and development          
Related Party Transaction          
Related party transaction expenses (231)   (408)    
Corporate Joint Venture | Commitment For Services          
Related Party Transaction          
Related party transaction expenses   (111) (84) (129)  
Corporate Joint Venture | Reimbursement from payroll related costs          
Related Party Transaction          
Related party transaction expenses $ (15) $ (10) $ (1) $ (15)