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Business Combination - Net Cash Flows (Details) - USD ($)
$ in Thousands
9 Months Ended
Jan. 17, 2020
Sep. 30, 2020
Sep. 30, 2019
Business Acquisition [Line Items]      
Acquisition of InstruNor, net of cash acquired   $ 5,154 $ 0
InstruNor AS      
Business Acquisition [Line Items]      
Cash consideration paid to former equity holders $ 5,165    
Less: cash and cash equivalents acquired (11)    
Acquisition of InstruNor, net of cash acquired $ 5,154