Note 4 - Diluted Net Income Per Share - Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 27, 2016	Nov. 29, 2015	Nov. 27, 2016	Nov. 29, 2015
Numerator:
Net income applicable to Common Stockholders	$ 1,326	$ 1,868	$ 4,638	$ 4,820
Denominator:
Weighted average shares for basic net income per share (in shares)	27,249	27,021	27,234	27,013
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	369	399	338	404
Weighted average shares for diluted net income per share (in shares)	27,618	27,420	27,572	27,417
Diluted net income per share (in dollars per share)	$ 0.05	$ 0.07	$ 0.17	$ 0.18