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Accrued Liabilities and Other Long Term Liabilities (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Components of other long term liabilities    
Long term portion of lease abandonment accrual $ 1,484 $ 1,787
Long term portion of deferred tax liability 69 54
Total $ 1,553 $ 1,841