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Note 8 - Income Taxes - Income Tax Rate Reconcilliation (Details) - USD ($)
$ in Thousands
12 Months Ended
May. 31, 2015
May. 25, 2014
May. 26, 2013
Provision at U.S. statutory rate (1) [1] $ 7,451 $ 10,405 $ 11,214
State income taxes, net of federal benefit 566 711 731
Change in valuation allowance $ 353 $ 99 $ 370
Tax-exempt interest      
Tax credit carryforwards $ (375) $ (378) $ (801)
Domestic manufacturing deduction $ (369) $ (406) (172)
Change in value of contingent consideration     (1,450)
Other $ 120 $ 152 (440)
Total $ 7,746 $ 10,583 $ 9,452
[1] Statutory rate was 35% for fiscal years 2015, 2014 and 2013.