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4. Property, Plant and Equipment, net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment Net Details
Leasehold improvements	$ 294	$ 274
Machinery and equipment	5,289	4,934
Less accumulated depreciation and amortization	(4,470)	(4,050)
Property, plant and equipment, net	$ 1,113	$ 1,158

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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- 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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