Note 13 - New Accounting Standards (Details Textual) - Accounting Standards Update 2016-02 [Member] - Scenario, Forecast [Member] $ in Millions	Dec. 30, 2018 USD ($)
Minimum [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 6.7
Maximum [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 7.1

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant