Note 4 - Stock-based Compensation	9 Months Ended
Note 4 - Stock-based Compensation	Jan. 28, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	4 . STOCK-BASED COMPENSATION During the nine months ended January 28, 2017, options to purchase 12,600 shares were exercised (weighted average exercise price of $14.72 per share) and options to purchase 6,400 shares were cancelled (weighted average exercise price of $15.64). At January 28, 2017, options to purchase 399,895 shares (weighted average exercise price of $12.28 per share) were outstanding and stock-based awards to purchase 2,809,014 shares of common stock were available for grant.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.