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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Jan. 31, 2012
Jan. 31, 2011
Consolidated Balance Sheets [Abstract]    
Allowance for doubtful accounts receivables $ 350 $ 200
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 3,000,000 3,000,000
Preferred stock, shares issued      
Preferred stock, shares outstanding      
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares issued 14,354,046 14,204,998
Common stock, shares outstanding 14,354,046 14,204,998