Annual report pursuant to Section 13 and 15(d)

Costs and Estimated Earnings on Uncompleted Contracts - Reconciliation of Net Billings in Excess of Costs and Estimated Earnings (Detail)

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Costs and Estimated Earnings on Uncompleted Contracts - Reconciliation of Net Billings in Excess of Costs and Estimated Earnings (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Contractors [Abstract]    
Costs and estimated earnings in excess of billings on uncompleted contracts $ 9,334 $ 4,592
Billings in excess of costs and estimated earnings on uncompleted contracts (38,738) (32,108)
Net billings in excess of costs and estimated earnings on uncompleted contracts $ (29,404) $ (27,516)