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Basis of Presentation and Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Revenue from External Customer [Line Items]    
Net sales $ 3,783 $ 3,177
Commercial    
Revenue from External Customer [Line Items]    
Net sales 1,736 1,983
MMM products    
Revenue from External Customer [Line Items]    
Net sales $ 2,047 $ 1,194