Note 7 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	May. 02, 2015	May. 03, 2014		Apr. 27, 2013	Apr. 28, 2012
Internal Revenue Service (IRS) [Member] | Review of Fed Review of Federal Income Tax Returns Three Years Ended April 2013 [Member]
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations		$ 1,907,000
Unrecognized Tax Benefits	$ 1,801,000	2,123,000		$ 4,349,000	$ 4,548,000
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	191,000
Changes in IncomeTax if All Uncertain Tax Positions Prevail	1,200,000
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	444,000	$ 2,494,000	[1]	$ 614,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	269,000
Unrecognized Tax Benefits, Period Increase (Decrease)	$ 82,000

[1] Includes $1,907 related to the Internal Revenue Service review of the Company’s federal income tax returns for the three years ended April 2013 noted above.