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Consolidated Statements of Income (Unaudited) (USD $)
 3 Months Ended
Aug. 26, 2012
Aug. 28, 2011
Product sales $ 101,303,000 $ 72,321,000
Services revenue, related party 771,000 980,000
Total revenues 102,074,000 73,301,000
Cost of product sales 87,664,000 61,269,000
Cost of services revenue 647,000 782,000
Total cost of revenue 88,311,000 62,051,000
Gross profit 13,763,000 11,250,000
Research and development 2,204,000 2,333,000
Selling, general and administrative 8,556,000 6,044,000
Total operating costs and expenses 10,760,000 8,377,000
Operating income 3,003,000 2,873,000
Dividend income 281,000 281,000
Interest income 26,000 76,000
Interest expense (541,000) (176,000)
Other income 4,259,000 9,000
Net income before taxes 7,028,000 3,063,000
Income tax expense (2,565,000) (1,110,000)
Consolidated net income 4,463,000 1,953,000
Non controlling interest (97,000) (141,000)
Net income applicable to Common Stockholders 4,366,000 1,812,000
Basic net income per share (in Dollars per share) $ 0.17 $ 0.07
Diluted net income per share (in Dollars per share) $ 0.17 $ 0.07
Basic (in Shares) 25,670 26,409
Diluted (in Shares) 26,212 26,687
Interest rate swap   (54,000)
Income tax benefit   20,000
Other comprehensive income, net of tax   (34,000)
Comprehensive income attributable to Common Shareholders $ 4,366,000 $ 1,778,000