Annual report pursuant to Section 13 and 15(d)

Revenues - Disaggregation of Accounts Receivable (Details)

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Revenues - Disaggregation of Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]    
Allowance for doubtful accounts $ (39) $ 0
Total accounts receivable 2,629 2,903
Commercial and other | Customer Concentration Risk | Accounts Receivable    
Disaggregation of Revenue [Line Items]    
Accounts receivable before allowance for credit loss 92 1,568
U.S. federal government and agencies | Customer Concentration Risk | Accounts Receivable    
Disaggregation of Revenue [Line Items]    
Accounts receivable before allowance for credit loss $ 2,576 $ 1,335