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GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION - Property and Equipment by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 7,687	$ 10,552
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	4,571	5,306
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,376	2,396
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	212	2,281
Others
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 528	$ 569

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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