Consolidated Statements of Changes in Stockholder's Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at May. 31, 2009	$ 26	$ 116,158	$ 9,222		$ 125,406	$ 1,790
Balance (in Shares) at May. 31, 2009	26,326,889
Issuance of common stock	1	378			379
Issuance of common stock (in Shares)	121,442
Issuance of common stock for vested restricted stock units (in Shares)	41,928
Taxes paid by Company for stock swaps and RSUs		(339)			(339)
Stock based compensation		1,016			1,016
Tax benefit from stock-based compensation expense		517			517
Non-controlling interest						482	482
Payments to non-controlling interest						(581)
Net income and comprehensive income			3,984	(179)	3,805
Balance at May. 30, 2010	27	117,730	13,206	(179)	130,784	1,691
Balance (in Shares) at May. 30, 2010	26,490,259
Balance at May. 09, 2010
Issuance of common stock		126			126
Issuance of common stock (in Shares)	91,091
Issuance of common stock for vested restricted stock units (in Shares)	40,133
Common stock repurchased on the open market		(1,184)			(1,184)
Common stock repurchased on the open market (in Shares)	(215,684)
Taxes paid by Company for stock swaps and RSUs		(218)			(218)
Stock based compensation		1,951			1,951
Tax benefit from stock-based compensation expense		764			764
Non-controlling interest						341
Payments to non-controlling interest						(361)
Net income and comprehensive income			3,920	(88)	3,832
Balance at May. 29, 2011	27	119,169	17,126	(267)	136,055	1,671	136,055
Balance (in Shares) at May. 29, 2011	26,405,799
Issuance of common stock		61			61
Issuance of common stock (in Shares)	72,572
Issuance of common stock for vested restricted stock units (in Shares)	83,453
Common stock repurchased on the open market	(1)	(5,005)			(5,006)		5,006
Common stock repurchased on the open market (in Shares)	(917,244)
Taxes paid by Company for stock swaps and RSUs		(260)			(260)
Stock based compensation		1,872			1,872
Tax benefit from stock-based compensation expense		4,057			4,057
Non-controlling interest						403	403
Payments to non-controlling interest						(258)
Net income and comprehensive income			12,696	267	12,963
Balance at May. 27, 2012	$ 26	$ 119,894	$ 29,822		$ 149,742	$ 1,816	$ 149,742
Balance (in Shares) at May. 27, 2012	25,644,580