Supplemental Balance Sheet Disclosures (Details) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Inventory valuation
Raw materials	$ 2,761,521	$ 2,752,833
Work-in-process	860,724	555,495
Finished goods	289,886	493,219
Inventory	3,912,131	3,801,547
Prepaid expenses and other current assets
Revenue recognized not yet invoiced	4,001,505	1,595,436
Prepaid insurance	192,975	176,340
Other	210,693	259,868
Total	$ 4,405,173	$ 2,031,644

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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