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Contracts Receivable Including Retainage, Net
 9 Months Ended
Jun. 30, 2023
Contractors [Abstract]  
Contracts Receivable Including Retainage, Net Contracts Receivable Including Retainage, Net
Contracts receivable including retainage, net consisted of the following at June 30, 2023 and September 30, 2022 (in thousands):
June 30, 2023September 30, 2022
(unaudited)
Contracts receivable$208,586 $221,566 
Retainage47,285 44,253 
255,871 265,819 
Allowance for doubtful accounts(899)(612)
Contracts receivable including retainage, net$254,972 $265,207 
Retainage receivables have been billed, but are not due until contract completion and acceptance by the customer.