Note 5 - Derivative Financial Instruments (Details Textual) (USD $)	Jan. 31, 2015	May 03, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, Notional Amount	$ 44,900,000invest_DerivativeNotionalAmount
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	(424,000)
Accounts Payable and Accrued Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Liability, Current	697,000
Other Noncurrent Assets [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Asset, Noncurrent	56,000
Prepaid Expenses and Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Asset, Current	$ 273,000	$ 5,000

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details