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Net Income Per Share - Weighted Average Shares (Detail) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Jan. 31, 2016
Feb. 01, 2015
Jan. 31, 2016
Feb. 01, 2015
Earnings Per Share [Abstract]        
Weighted average common shares outstanding, basic 12,331 12,219 12,317 12,216
Dilutive effect of stock-based compensation 155 198 171 194
Weighted average common shares outstanding, diluted 12,486 12,417 12,488 12,410