Costs and Estimated Earnings in Excess of Billings - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Detail) (USD $)	Sep. 30, 2014	Sep. 30, 2013
Costs in Excess of Billings on Uncompleted Contracts or Programs [Abstract]
Costs incurred on uncompleted contracts	$ 846,000
Estimated earnings	279,000
Costs and estimated earnings in excess of billings on uncompleted contracts	1,125,000	0
Costs and estimated earnings in excess of billings on uncompleted contracts	1,125,000	0
Billings to date	781,000
Costs and estimated earnings in excess of billings	$ 344,000