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Income Taxes (Details 4) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Mar. 31, 2012
Net deferred income tax liability    
Current deferred income tax asset $ 69 $ 37
Long-term deferred income tax asset 150 22
Current deferred income tax liability (373) (2,244)
Long-term deferred income tax liability (7,131) (7,404)
Total $ (7,285) $ (9,589)