Costs and Estimated Earnings in Excess of Billings (Details) (USD $)	Jun. 30, 2012	Sep. 30, 2011
Schedule of cost and estimated earnings in excess of billings on uncompleted contracts
Costs incurred on uncompleted contracts	$ 10,048,000	$ 7,039,000
Estimated earnings	4,169,000	2,059,000
Costs and estimated earnings on uncompleted contracts	14,217,000	9,098,000
Billings to date	10,001,000	4,648,000
Costs and estimated earnings in excess of billings	$ 4,216,000	$ 4,450,000