Note 5 - Derivative Financial Instruments (Details Textual) - USD ($)	Jan. 30, 2016	May. 02, 2015
Other Liabilities [Member]
Derivative, Notional Amount	$ 18,600,000
Derivative Liability, Noncurrent		$ 751,000
Accrued Liabilities1 [Member]
Derivative Liability, Current	4,200,000	$ 3,000,000
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	$ (4,200,000)