Note 9 - Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 06, 2017	May 31, 2016
Beginning of fiscal year	$ 4,548	$ 3,870
Additions for tax positions related to the current year	532	725
Reductions for tax positions related to the current year	(127)	(113)
Additions for tax positions of prior years	164	868
Reductions for tax positions of prior years	(228)	(150)
Reductions for settlements with taxing authorities	(779)
Reductions due to statute settlements	(220)	(652)
End of fiscal year	$ 3,890	$ 4,548