PROPERTY AND EQUIPMENT - Summary of property and equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 82,009	$ 79,664
Less accumulated depreciation	51,824	47,837
Property, plant and equipment, net, excluding land and construction in progress	30,185	31,827
Land	1,368	1,368
Construction in progress	817	1,324
Property and equipment, net	32,370	34,519
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	29,314	29,251
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	50,452	48,170
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,251	1,251
Land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 992	$ 992

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