Costs and Estimated Earnings in Excess of Billings - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Detail) (USD $)	Mar. 31, 2015	Sep. 30, 2014
Costs in Excess of Billings on Uncompleted Contracts or Programs [Abstract]
Costs incurred on uncompleted contracts	$ 5,509,000	$ 846,000
Estimated earnings	2,025,000	279,000
Costs and estimated earnings in excess of billings on uncompleted contracts	7,534,000	1,125,000
Costs and estimated earnings in excess of billings on uncompleted contracts	7,534,000	1,125,000
Billings to date	5,190,000	781,000
Costs and estimated earnings in excess of billings	$ 2,344,000	$ 344,000