Note 6 - Derivative Financial Instruments (Details Textual) - USD ($)	Apr. 30, 2016	May 02, 2015
Accrued Liabilities1 [Member]
Derivative Liability, Current	$ 2,500,000	$ 3,000,000
Other Liabilities [Member]
Derivative Liability, Noncurrent		$ 751,000
Derivative, Notional Amount	14,400,000
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	$ 2,500,000