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Property and Equipment (Details) - USD ($)
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Property and equipment      
Property and equipment, gross $ 18,756,406 $ 18,645,760  
Less: accumulated depreciation and amortization (12,087,395) (11,683,198)  
Property and equipment, net 6,669,011 6,962,562  
Depreciation 400,000 500,000 $ 600,000
Computer equipment      
Property and equipment      
Property and equipment, gross 2,247,866 2,208,398  
Corporate airplane      
Property and equipment      
Property and equipment, gross 3,194,571 3,194,571  
Depreciation 0    
Furniture and office equipment      
Property and equipment      
Property and equipment, gross 1,051,637 1,052,284  
Manufacturing facility      
Property and equipment      
Property and equipment, gross 5,733,313 5,733,313  
Equipment      
Property and equipment      
Property and equipment, gross 5,507,774 5,435,949  
Land      
Property and equipment      
Property and equipment, gross $ 1,021,245 $ 1,021,245