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Income Taxes (Details Textual) (USD $)
 9 Months Ended
Oct. 31, 2012
Oct. 31, 2011
Jan. 31, 2012
Income Taxes (Textual) [Abstract]      
Federal statutory corporate income tax rate 35.00% 34.00%  
Other income tax adjustments to federal return $ 116,000    
Accrued income taxes included in accrued expenses 869,000    
Prepaid income taxes included in prepaid expenses and other current assets     1,602,000
Net deferred tax assets $ 1,094,000   $ 1,529,000