Property Plant and Equipment (Details) (USD $)	Jul. 31, 2013	Jan. 31, 2013
Summary of property, plant and equipment
Property and equipment, gross	$ 8,175,000	$ 13,230,000
Less - accumulated depreciation	3,987,000	3,762,000
Property, plant and equipment, net	4,188,000	9,468,000
Land and improvements [Member]
Summary of property, plant and equipment
Property and equipment, gross	473,000	471,000
Building and improvements [Member]
Summary of property, plant and equipment
Property and equipment, gross	2,709,000	2,587,000
Furniture, machinery and equipment [Member]
Summary of property, plant and equipment
Property and equipment, gross	3,349,000	3,060,000
Trucks and other vehicles [Member]
Summary of property, plant and equipment
Property and equipment, gross	1,644,000	1,803,000
Construction project costs of variable interest entities [Member]
Summary of property, plant and equipment
Property and equipment, gross		$ 5,309,000