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Property and Equipment: (Details) - USD ($)
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Property and equipment      
Property and equipment, gross $ 18,375,537 $ 18,281,725  
Less: Accumulated depreciation and amortization (11,280,207) (10,814,062)  
Property and equipment, net 7,095,330 7,467,663  
Depreciation 600,000 600,000 $ 500,000
Computer equipment      
Property and equipment      
Property and equipment, gross 2,270,799 2,292,548  
Corporate airplane      
Property and equipment      
Property and equipment, gross 3,128,504 3,128,504  
Depreciation 0    
Furniture and office equipment      
Property and equipment      
Property and equipment, gross 1,056,486 1,063,254  
Manufacturing facility      
Property and equipment      
Property and equipment, gross 5,733,313 5,728,437  
Equipment      
Property and equipment      
Property and equipment, gross 5,165,190 5,047,737  
Land      
Property and equipment      
Property and equipment, gross $ 1,021,245 $ 1,021,245