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Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accounts receivable    
Trade accounts receivable $ 9,316 $ 8,140
Unbilled accounts receivable 611 450
Other receivables 19  
Allowance for product returns and price adjustments (663) (397)
Accounts receivable, net $ 9,283 $ 8,193