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Supplemental Balance Sheet Disclosures - Accrued Expenses (Details) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2016	Sep. 30, 2015
Accrued expenses
Warranty	$ 987,947	$ 878,901	$ 996,660	$ 878,901
Salary, benefits and payroll taxes			546,722	537,451
Professional fees			707,604	353,012
Other, including losses on contracts			331,288	799,167
Total accrued expenses			2,582,274	2,568,531
EDC program costs			$ 0	$ 600,000
Warranty cost and accrual information
Warranty accrual, beginning of period	987,947	878,901
Accrued expense	49,948	272,310
Warranty cost	(41,235)	(154,551)
Warranty accrual, end of period	$ 996,660	$ 996,660

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs of engineering development contracts program. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle, if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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