Note 5 - Derivative Financial Instruments (Details) (USD $)	Jul. 27, 2013	Apr. 27, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Notional Amount	$ 21,700,000
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	1,400,000
Derivative, Fair Value, Net	$ 1,400,000	$ 964,000