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Revenue from Contracts with Customers (ASC 606) Schedule of Financial Statement Line Items as Filed and as Adjusted (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Product sales $ 36,926 $ 39,730 $ 73,494 $ 76,106
Net loss (3,552) (3,294) (9,766) (9,791)
Product        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Product sales 13,949 15,189 27,043 28,404
Cost of product sales $ 9,554 12,649 $ 19,190 20,933
As reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Net loss   (3,454)   (9,876)
As reported | Product        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Product sales   14,694   27,568
Cost of product sales   $ 12,308   $ 20,161