Note 8 - Summary of Stock Option Activity (Details) - $ / shares		12 Months Ended
		Apr. 30, 2016	May 02, 2015	May 03, 2014	Apr. 30, 2016
Options outstanding, beginning of year (in shares)		613,135
Options outstanding, beginning of year (in dollars per share)	[1]	$ 11.23
Granted (in shares)		3,500	276,800	5,245
Granted (in dollars per share)	[1]	$ 9.53
Exercised (in shares)		(170,715)
Exercised (in dollars per share)	[1]	$ 4.97
Cancelled (in shares)		(27,025)
Cancelled (in dollars per share)	[1]	$ 15.62
Options outstanding, end of year (in shares)		613,135	613,135		418,895
Options outstanding, end of year (in dollars per share)	[1]	$ 11.23	$ 11.23		$ 12.44
Options exercisable, end of year (in shares)		170,056
Options exercisable, end of year (in dollars per share)	[1]	$ 9.64

[1] Weighted average exercise price.