Note 1 - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	May 02, 2015	May 03, 2014
Balance at beginning of year	$ 330	$ 399	$ 454
Net charge to expense	232	117	95
Net charge-off	(78)	(186)	(150)
Balance at end of year	$ 484	$ 330	$ 399