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Property and Equipment (Details) - USD ($)
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Property and equipment      
Property and equipment, gross $ 18,645,760 $ 18,375,537  
Less accumulated depreciation and amortization (11,683,198) (11,280,207)  
Property and equipment, net 6,962,562 7,095,330  
Depreciation 500,000 600,000 $ 600,000
Computer equipment      
Property and equipment      
Property and equipment, gross 2,208,398 2,270,799  
Corporate airplane      
Property and equipment      
Property and equipment, gross 3,194,571 3,128,504  
Depreciation 0    
Furniture and office equipment      
Property and equipment      
Property and equipment, gross 1,052,284 1,056,486  
Manufacturing facility      
Property and equipment      
Property and equipment, gross 5,733,313 5,733,313  
Equipment      
Property and equipment      
Property and equipment, gross 5,435,949 5,165,190  
Land      
Property and equipment      
Property and equipment, gross $ 1,021,245 $ 1,021,245