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Accounts Receivable and Contract Assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Accounts Receivable and Contract Assets [Abstract]    
Accounts receivable - customers $ 5,742 $ 5,034
Other receivables 352 455
Accounts receivable 6,094 5,489
Less: allowance for doubtful accounts (824) (855)
Accounts receivable, net 5,270 4,634
Unbilled revenue 3,014 $ 2,784
Change in accounts receivable - customers 708  
Change in other receivables (103)  
Change in accounts receivable 605  
Change in allowance for doubtful accounts 31  
Change in accounts receivable, net 636  
Change in unbilled revenue $ 230