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Costs and Estimated Earnings in Excess of Billings (Details) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Costs and estimated earnings in excess of billings on uncompleted contracts
Costs incurred on uncompleted contracts	$ 9,694,000	$ 4,986,000
Estimated earnings	3,639,000	1,518,000
Costs and estimated earnings on uncompleted contracts	13,333,000	6,504,000
Billings to date	9,764,000	3,056,000
Costs and estimated earnings in excess of billings	$ 3,569,000	$ 3,448,000

Amount included in cost of uncompleted contracts in excess of related billings, or unbilled accounts receivable, which is expected to be collected within a year within one year (or one operating cycle, if longer) from the date of the balance sheet.

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