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Income Tax (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits    
Unrecognized tax benefits at the beginning of the period $ 60   
Gross increases for tax positions 7 60
Unrecognized tax benefits at the end of the period $ 67 $ 60