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Income Taxes (Details 5) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Schedule of reconciliation of uncertain tax position    
Balance as of January 1 $ 49 $ 83
Additions for tax positions current year 134 19
Reductions for expirations on tax positions of prior years (21) (53)
Balance as of December 31 $ 162 $ 49