BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounting Policies [Line Items]
Inventory Evaluation Tools Amortization Period	5 years
Impairment of Long-Lived Assets Held-for-use	$ 200,000	$ 0	$ 0
Length of Product Warranty	12 months
Invoice Amount Recognized As Revenue Upon Shipment, Percent	90.00%
Allocated Share-based Compensation Expense	1,565,000	2,304,000	2,744,000
Foreign Currency Transaction Gain, before Tax	400,000
Foreign Currency Transaction Loss, before Tax		(700,000)
Cumulative translation adjustment	20,978,000	20,466,000
Equipment Cost Recognized Upon Shipment, Percent	100.00%
Invoice Amount Recognized As Revenue Upon Final Customer Acceptance, Percent	10.00%
Depreciation	2,700,000	5,700,000	6,700,000
Inventory Amortization Expense	1,000,000	3,100,000	2,200,000
Cash, cash equivalents and restricted cash	16,200,000
Working capital	$ 41,500,000
Minimum
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum
Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Accounting Policies [Line Items]
Number of Significant Customers	2	3	2