Supplemental Balance Sheet Disclosures - Accrued Expenses (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Sep. 30, 2015
Accrued expenses
Warranty	$ 878,901	$ 987,947	$ 878,901
Salary, benefits and payroll taxes		369,540	537,451
Professional fees		681,321	353,012
Other		868,198	799,167
Total		2,907,006	2,568,531
EDC program costs		$ 500,000	$ 600,000
Warranty cost and accrual information
Warranty accrual, beginning of period	878,901
Accrued expense	222,362
Warranty cost	(113,316)
Warranty accrual, end of period	$ 987,947