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Restructuring (Details) (USD $)	1 Months Ended	12 Months Ended
Restructuring (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Reduction in workforce	29.00%
Restructuring charge		$ 373,000
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge		93,000
Operating Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge		$ 280,000

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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