Note 8 - Income Taxes (Details) - Reconciliation of the Statutory Federal Income Tax Rate to Effective Tax Rate	12 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 30, 2011
Reconciliation of the Statutory Federal Income Tax Rate to Effective Tax Rate [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	1.60%	2.70%	2.40%
Manufacturing deduction benefit	(3.10%)	(3.10%)	(3.00%)
Other differences	(0.10%)	(0.40%)	0.50%
Effective income tax rate	33.40%	34.20%	34.90%