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Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Effective Income Tax Rate, Continuing Operations 11.00%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00%  
Income Tax Expense (Benefit) $ (241) $ 1