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Revenue (Schedule of Accounts Receivable) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Receivables [Abstract]    
Completed contracts $ 1,530 $ 4,682
Contracts in progress 18,172 32,546
Retainage 11,204 8,226
Accounts receivable, gross 30,906 45,454
Allowance for credit losses (564) (564)
Total accounts receivable—net $ 30,342 $ 44,890