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Consolidated Statements Of Income (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Feb. 26, 2012
Feb. 27, 2011
Feb. 26, 2012
Feb. 27, 2011
Revenues:        
Product sales $ 79,365 $ 71,490 $ 229,577 $ 201,470
Services revenue, related party 545 549 2,330 2,600
License fees 154 1,470 3,028 4,560
Total revenues 80,064 73,509 234,935 208,630
Cost of revenue:        
Cost of product sales 65,492 60,321 191,784 167,524
Cost of product sales, related party 940 227 3,812 2,748
Cost of services revenue 460 483 1,907 2,208
Total cost of revenue 66,892 61,031 197,503 172,480
Gross profit 13,172 12,478 37,432 36,150
Operating costs and expenses:        
Research and development 2,473 2,275 7,142 6,762
Selling, general and administrative 6,664 6,458 19,172 18,183
Total operating costs and expenses 9,137 8,733 26,314 24,945
Operating income 4,035 3,745 11,118 11,205
Dividend income 281 47 844 47
Interest income 63 120 219 344
Interest expense (153) (196) (492) (631)
Other income (expense) 3,508 (44) 4,595 (146)
Net income before taxes 7,734 3,672 16,284 10,819
Income tax expense (2,920) (1,350) (6,079) (3,911)
Consolidated net income 4,814 2,322 10,205 6,908
Non controlling interest (49) (24) (288) (251)
Net income applicable to Common Stockholders $ 4,765 $ 2,298 $ 9,917 $ 6,657
Basic net income per share $ 0.19 $ 0.09 $ 0.38 $ 0.25
Diluted net income per share $ 0.18 $ 0.09 $ 0.38 $ 0.25
Shares used in per share computation        
Basic 25,538 26,375 25,944 26,399
Diluted 25,825 26,634 26,205 26,654