PROPERTY AND EQUIPMENT, NET: (Details) - USD ($)	Sep. 30, 2015	Sep. 30, 2014
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	$ 37,308,998	$ 36,973,137
Less accumulated depreciation and amortization: Property and equipment	(24,555,853)	(23,209,997)
Property and equipment, net	12,753,145	13,763,140
Land
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	648,818	648,818
Buildings
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	10,609,478	9,220,122
Warehouse equipment
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	12,801,465	11,725,727
Furniture, fixtures and leasehold improvements
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	10,656,515	10,588,837
Vehicles
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	2,536,919	2,840,963
Construction in progress
PROPERTY AND EQUIPMENT, NET
Property and equipment, gross	$ 55,803	$ 1,948,670