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Costs and Estimated Earnings in Excess of Billings - Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts (Detail) (USD $) | Sep. 30, 2013 | Sep. 30, 2012
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Costs In Excess Of Billings On Uncompleted Contracts Or Programs [Abstract] |  |
Costs incurred on uncompleted contracts |  | $ 4,986,000
Estimated earnings |  | 1,518,000
Costs and estimated earnings on uncompleted contracts |  | 6,504,000
Billings to date |  | 3,056,000
Costs and estimated earnings in excess of billings | $ 0 | $ 3,448,000

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