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Contracts Receivable Including Retainage, Net
 3 Months Ended
Dec. 31, 2023
Contractors [Abstract]  
Contracts Receivable Including Retainage, Net Contracts Receivable Including Retainage, Net
Contracts receivable including retainage, net consisted of the following at December 31, 2023 and September 30, 2023 (in thousands):
December 31, 2023September 30, 2023
(unaudited)
Contracts receivable$202,386 $251,324 
Retainage receivable54,308 53,286 
256,694 304,610 
Allowance for doubtful accounts(1,165)(906)
Contracts receivable including retainage, net$255,529 $303,704 
Retainage receivable has been billed and the Company has an unconditional right to payment, but such payment is not due until satisfactory contract completion and acceptance by the customer.