Property and Equipment (Detail) - Property and equipment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property and equipment, Gross	$ 16,995	$ 16,883
Less accumulated depreciation	(14,995)	(14,234)
Property and equipment, Net	2,000	2,649
Building and Building Improvements [Member]
Property and equipment, Gross	855	825
Furniture and Fixtures [Member]
Property and equipment, Gross	2,357	2,387
Computer Hardware And Software [Member]
Property and equipment, Gross	1,477	1,456
Machinery and Equipment [Member]
Property and equipment, Gross	12,269	12,182
Vehicles [Member]
Property and equipment, Gross	$ 37	$ 33

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.

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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.

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- 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.

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