Note 4 - Diluted Net Income Per Share - Diluted Net Income Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 29, 2015	Nov. 30, 2014	Nov. 29, 2015	Nov. 30, 2014
Numerator:
Net income applicable to Common Stockholders	$ 1,868	$ 3,223	$ 4,820	$ 5,576
Denominator:
Weighted average shares for basic net income per share (in shares)	27,021	26,864	27,013	26,852
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	399	450	404	441
Weighted average shares for diluted net income per share (in shares)	27,420	27,314	27,417	27,293
Diluted net income per share (in dollars per share)	$ 0.07	$ 0.12	$ 0.18	$ 0.20