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Contracts Receivable Including Retainage, Net
 9 Months Ended
Jun. 30, 2019
Contractors [Abstract]  
Contracts Receivable Including Retainage, Net Contracts Receivable Including Retainage, net
Contracts receivable including retainage, net consisted of the following at June 30, 2019 and September 30, 2018 (in thousands):

June 30, 2019September 30, 2018
(unaudited)
Contracts receivable$117,046 $104,541 
Retainage19,182 16,848 
136,228 121,389 
Allowance for doubtful accounts(1,519)(1,098)
Contracts receivable including retainage, net$134,709 $120,291 

Retainage receivables have been billed, but are not due until contract completion and acceptance by the customer.