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Public Offering of Common Stock
6 Months Ended
Jul. 31, 2011
Public Offering of Common Stock/Comprehensive Income [Abstract]  
Public Offering of Common Stock
8. Public Offering of Common Stock
     In June 2011, the Company completed a public offering of 2,300,000 shares of its common stock, par value $0.01. After deducting underwriting discounts and commissions and expenses of the offering, net proceeds to the Company were approximately $31.0 million.