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Accounts Receivable and Contract Assets (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Accounts Receivable and Contract Assets [Abstract]    
Accounts receivable - customers $ 7,994 $ 7,069
Other receivables 235 487
Accounts receivable 8,229 7,556
Less: allowance for doubtful accounts (875) (855)
Accounts receivable, net 7,354 6,701
Unbilled revenue 3,249 $ 3,290
Change in accounts receivable - customers 925  
Change in other receivables (252)  
Change in accounts receivable 673  
Change in allowance for doubtful accounts (20)  
Change in accounts receivable, net 653  
Change in unbilled revenue $ (41)