Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 11,657	$ 11,328
Furniture fixtures and computer equipment	4,741	4,736
Leasehold improvements	3,854	3,775
Construction in progress	119	105
Property, Plant and Equipment, Gross	20,371	19,944
Accumulated depreciation and amortization	(19,174)	(18,590)
Property and equipment, net	1,197	1,354
Depreciation	$ 705	$ 811

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

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References+ Details

- Definition

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