Consolidated Statements of Comprehensive Income (Unaudited) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 25, 2013	Aug. 26, 2012
Revenues:
Product sales	$ 108,929,000	$ 101,303,000
Services revenue, related party	550,000	771,000
Total revenues	109,479,000	102,074,000
Cost of revenue:
Cost of product sales	96,430,000	87,664,000
Cost of services revenue	517,000	647,000
Total cost of revenue	96,947,000	88,311,000
Gross profit	12,532,000	13,763,000
Operating costs and expenses:
Research and development	1,926,000	2,204,000
Selling, general and administrative	8,630,000	8,556,000
Total operating costs and expenses	10,556,000	10,760,000
Operating income	1,976,000	3,003,000
Dividend income	281,000	281,000
Interest income	60,000	26,000
Interest expense	(431,000)	(541,000)
Other income	5,400,000	4,259,000
Net income before taxes	7,286,000	7,028,000
Income tax expense	(2,475,000)	(2,565,000)
Consolidated net income	4,811,000	4,463,000
Non-controlling interest	(59,000)	(97,000)
Net income and comprehensive income applicable to common stockholders	$ 4,752,000	$ 4,366,000
Basic net income per share (in Dollars per share)	$ 0.18	$ 0.17
Diluted net income per share (in Dollars per share)	$ 0.18	$ 0.17
Basic (in Shares)	26,452	25,670
Diluted (in Shares)	27,081	26,212