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PROPERTY AND EQUIPMENT, NET: (Details) (USD $)
Sep. 30, 2014
Sep. 30, 2013
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross $ 36,973,137 $ 34,601,002
Less accumulated depreciation and amortization: Property and equipment (23,209,997) (21,512,143)
Property and equipment, net 13,763,140 13,088,859
Land
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 648,818 648,818
Buildings
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 9,220,122 9,166,545
Warehouse equipment
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 11,725,727 11,318,709
Furniture, fixtures and leasehold improvements
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 10,588,837 10,396,053
Vehicles
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross 2,840,963 2,873,452
Construction in progress
   
PROPERTY AND EQUIPMENT, NET    
Property and equipment, gross $ 1,948,670 $ 197,425