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Contracts Receivable Including Retainage, net
 3 Months Ended
Dec. 31, 2019
Contractors [Abstract]  
Contracts Receivable Including Retainage, net Contracts Receivable Including Retainage, net
Contracts receivable including retainage, net consisted of the following at December 31, 2019 and September 30, 2019 (in thousands):
December 31, 2019September 30, 2019
(unaudited)
Contracts receivable$99,095  $121,050  
Retainage20,587  19,835  
119,682  140,885  
Allowance for doubtful accounts(1,134) (1,003) 
Contracts receivable including retainage, net$118,548  $139,882  
Retainage receivables have been billed, but are not due until contract completion and acceptance by the customer.