Note 1 - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	May. 02, 2015	May. 03, 2014	Apr. 27, 2013
Balance at beginning of year	$ 399	$ 454	$ 399
Net charge to expense	117	95	96
Net charge-off	(186)	(150)	(41)
Balance at end of year	$ 330	$ 399	$ 454