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Revenue - Disaggregated by Sales Channel (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation of Revenue        
Revenue $ 11,826 $ 8,646 $ 21,934 $ 18,672
Distributor        
Disaggregation of Revenue        
Revenue 6,231 5,564 13,221 12,749
Non-distributor        
Disaggregation of Revenue        
Revenue $ 5,595 $ 3,082 $ 8,713 $ 5,923