Note 5 - Derivative Financial Instruments (Details Textual) - USD ($) $ in Millions	Jul. 30, 2016	Apr. 30, 2016
Accrued Liabilities1 [Member]
Derivative Liability, Current	$ 1.8	$ 2.5
Derivative, Notional Amount	9.3
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	$ 1.8

- 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.

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