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Revenue Recognition (Narrative) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
customer
Mar. 31, 2020
USD ($)
customer
Dec. 31, 2020
customer
Disaggregation of Revenue [Line Items]      
Total Net Revenue $ 31,768 $ 21,503  
Cost of goods sold $ 23,558 16,931  
Other Medical Market Error Correction [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Disaggregation of Revenue [Line Items]      
Total Net Revenue   (1,200,000)  
Cost of goods sold   $ (800,000)  
One Customer [Member] | Net Revenue [Member] | Customer Concentration Risk [Member]      
Disaggregation of Revenue [Line Items]      
Percentage of risk 68.00% 63.00%  
Number of customers | customer 1 1  
Two Customers [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]      
Disaggregation of Revenue [Line Items]      
Percentage of risk 60.00%   69.00%
Number of customers | customer 2   2
Two Customers [Member] | Contract Assets [Member] | Customer Concentration Risk [Member]      
Disaggregation of Revenue [Line Items]      
Number of customers | customer 2   2