Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Information (Summary of Property and Equipment) (Details)

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Balance Sheet Information (Summary of Property and Equipment) (Details) - USD ($)
 6 Months Ended
Mar. 31, 2021
Sep. 30, 2020
Property, Plant and Equipment [Line Items]    
Total plant and equipment $ 3,830,136 $ 3,855,224
Less: accumulated depreciation and amortization (3,558,970) (3,542,533)
Plant and equipment, net 271,166 312,691
Manufacturing Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total plant and equipment $ 2,697,662 2,752,854
Manufacturing Equipment [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 5 years  
Manufacturing Equipment [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 8 years  
Office Equipment, Furniture And Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Total plant and equipment $ 833,588 803,484
Office Equipment, Furniture And Fixtures [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 3 years  
Office Equipment, Furniture And Fixtures [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 10 years  
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total plant and equipment $ 298,886 $ 298,886
Leasehold Improvements [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 3 years  
Leasehold Improvements [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Estimated Useful Life 8 years