Note 13 - Stockholders' Equity (Details) - Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 23, 2014	Feb. 24, 2013	Feb. 23, 2014	Feb. 24, 2013
Common Stock Shares
Balance, Common Stock Shares (in Shares)			26,402,247
Stock options exercised, net of shares tendered (in Shares)			339,968
Vested restricted stock units, net of shares tendered (in Shares)			38,058
Balance, Common Stock Shares (in Shares)	26,780,273		26,780,273
Common Stock
Balance, Common Stock			$ 26
Stock options exercised, net of shares tendered			1
Balance, Common Stock	27		27
Additional Paid-in Capital
Balance, Additional Paid-in Capital			126,258
Stock options exercised, net of shares tendered			2,147
Taxes incurred by Company for RSUs vested			(326)
Stock-based compensation expense			992
Tax-benefit from stock based compensation expense			1,909
Balance, Additional Paid-in Capital	130,980		130,980
Retained Earnings
Balance, Retained Earnings			52,409
Net income	6,400	4,789	14,603	18,068
Balance, Retained Earnings	67,012		67,012
Non controlling Interest
Balance, Non Controlling Interest			1,721
Non controlling interest in net income	22	3	123	159
Distributions to non controlling interest			(226)	(320)
Balance, Non Controlling Interest	$ 1,618		$ 1,618