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Supplemental Balance Sheet Disclosures (Details 3) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2015
Sep. 30, 2014
Accrued expenses        
Warranty $ 826,136 $ 777,599 $ 823,759 $ 777,599
Salary, benefits and payroll taxes     367,799 787,277
Professional fees     263,618 431,612
Income taxes payable       185,151
Other     843,814 1,895,651
Accrued Liabilities, Current, Total     2,298,990 4,077,290
EDC program costs     $ 500,000 $ 1,500,000
Warranty cost and accrual information        
Warranty accrual, beginning of period 826,136 777,599    
Accrued expense 38,073 170,517    
Warranty cost (40,450) (124,357)    
Warranty accrual, end of period $ 823,759 $ 823,759