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Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares
May 29, 2016
May 31, 2015
May 25, 2014
Minimum [Member] | Parent [Member]      
Share Price $ 5.63 $ 5.63 $ 5.63
Maximum [Member] | Parent [Member]      
Share Price $ 9.01 $ 8.19 $ 13.32