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GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION - Property and Equipment by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 6,794	$ 7,387
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	3,501	3,824
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,920	3,131
Others
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 373	$ 432

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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