Note 13 - Stockholders' Equity (Details) - Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 24, 2013	Nov. 25, 2012	Nov. 24, 2013		Nov. 25, 2012
Common Stock Shares
Balance, Common Stock Shares (in Shares)			26,402,247	[1]
Stock options exercised, net of shares tendered (in Shares)			210,281
Vested restricted stock units, net of shares tendered (in Shares)			38,058
Balance, Common Stock Shares (in Shares)	26,650,586		26,650,586
Common Stock
Balance, Common Stock Value			$ 26	[1]
Stock options exercised, net of shares tendered			1
Balance, Common Stock Value	27		27
Additional Paid-in Capital
Balance, Additional Paid-in Capital			126,258	[1]
Stock options exercised, net of shares tendered			1,252
Taxes incurred by Company for RSUs vested			(293)
Stock-based compensation expense			639
Tax-benefit from stock based compensation expense			175
Balance, Additional Paid-in Capital	128,031		128,031
Retained Earnings
Balance, Retained Earnings			52,409	[1]
Net income	3,451	8,913	8,203		13,279
Balance, Retained Earnings	60,612		60,612
Non controlling Interest
Balance, Non Controlling Interest			1,721	[1]
Non controlling interest in net income	42	59	101		156
Distributions to non controlling interest			(226)		(321)
Balance, Non Controlling Interest	$ 1,596		$ 1,596

[1] Derived from audited financial statements.