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Note 5. Stock-based Compensation
3 Months Ended
Jul. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
5.  STOCK-BASED COMPENSATION

During the three months ended July 30, 2011, options to purchase 3,000 shares of common stock were granted (weighted average exercise price of $6.14 per share), options to purchase 41,300 shares were exercised (weighted average exercise price of $1.40 per share), and options to purchase 12,660 shares were cancelled (weighted average exercise price of $9.34 per share).  At July 30, 2011, options to purchase 550,660 shares (weighted average exercise price of $7.72 per share) were outstanding and stock-based awards to purchase 2,960,944 shares of common stock were available for grant.