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Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]
Reduction in workforce as a result of restructuring plan	29.00%
Restructuring charge	$ 373
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge	93
Operating Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 280

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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