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PROPERTY AND EQUIPMENT, NET: (Details) (USD $)
Sep. 30, 2013
Sep. 30, 2012
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross $ 34,601,002 $ 32,832,714
Less accumulated depreciation and amortization: Property and equipment (21,512,143) (19,748,802)
Property and equipment, net 13,088,859 13,083,912
Land
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 648,818 648,818
Buildings and improvements
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 9,166,545 9,154,544
Warehouse equipment
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 11,318,709 10,839,751
Furniture, fixtures and leasehold improvements
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 10,396,053 9,545,001
Vehicles
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 2,873,452 2,512,347
Construction in progress
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross $ 197,425 $ 132,253