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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($)
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Standard and Extended Product Warranty Accrual $ 431,000 $ 681,000 $ 650,000
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (155,491) (528,716)  
Research and Development Expense 4,811,465 5,193,085  
Available-for-sale Securities, Gross Unrealized Gains (559) (135)  
Available-for-sale Securities, Amortized Cost Basis 14,114 13,680  
Available-for-sale Securities, Debt Securities 13,555    
Share-based Compensation $ 42,071 $ 81,593  
Share Based Compensation per share $ 0.00 $ 0.01  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   1.60%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate   72.50%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term, Simplified Method   7.0 years