Property, Plant and Equipment (Details) (USD $)	Apr. 30, 2013	Jan. 31, 2013
Summary of property, plant and equipment
Property and equipment, gross	$ 11,252,000	$ 13,230,000
Less - accumulated depreciation	3,853,000	3,762,000
Property, plant and equipment, net	7,399,000	9,468,000
Land and improvements [Member]
Summary of property, plant and equipment
Property and equipment, gross	471,000	471,000
Building and improvements [Member]
Summary of property, plant and equipment
Property and equipment, gross	2,618,000	2,587,000
Furniture, machinery and equipment [Member]
Summary of property, plant and equipment
Property and equipment, gross	3,272,000	3,060,000
Trucks and other vehicles [Member]
Summary of property, plant and equipment
Property and equipment, gross	1,643,000	1,803,000
Construction project costs of variable interest entities [Member]
Summary of property, plant and equipment
Property and equipment, gross	$ 3,248,000	$ 5,309,000

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details