Note 10 - Stockholders' Equity (Details) - Consolidated Statements of Changes in Stockholders’ Equity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2014		Aug. 25, 2013
Common Stock Shares
Balance at May 25, 2014 (in Shares)	26,815,253	[1]
Stock options exercised, net of shares tendered (in Shares)	469
Vested restricted stock units, net of shares tendered (in Shares)	29,496
Balance at August 31, 2014 (in Shares)	26,845,218
Common Stock
Balance at May 25, 2014	$ 27	[1]
Balance at August 31, 2014	27
Additional Paid-in Capital
Balance at May 25, 2014	131,488	[1]
Stock options exercised, net of shares tendered	3
Taxes paid by Company for stock swaps and RSUs	(12)
Stock-based compensation expense	398
Tax from stock based compensation expense	(44)
Balance at August 31, 2014	131,833
Retained Earnings
Balance at May 25, 2014	71,554	[1]
Net income	2,353		4,752
Balance at August 31, 2014	73,907
Non controlling Interest
Balance at May 25, 2014	1,692	[1]
Non controlling interest in net income	71		59
Balance at August 31, 2014	$ 1,763

[1] Derived from audited financial statements.