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Contracts Receivable Including Retainage, Net
 3 Months Ended
Dec. 31, 2021
Contractors [Abstract]  
Contracts Receivable Including Retainage, Net Contracts Receivable Including Retainage, Net
Contracts receivable including retainage, net consisted of the following at December 31, 2021 and September 30, 2021 (in thousands):
December 31, 2021September 30, 2021
(unaudited)
Contracts receivable$134,785 $132,456 
Retainage31,740 27,640 
166,525 160,096 
Allowance for doubtful accounts(2,069)(1,926)
Contracts receivable including retainage, net$164,456 $158,170 
Retainage receivables have been billed, but are not due until contract completion and acceptance by the customer.