Note 10 - Acquisition of Nora - Schedule of Assets Acquired and Liabilities Assumed (Details) - Nora [Member] $ in Thousands	Aug. 07, 2018 USD ($)
Assets acquired (excluding goodwill)	$ 359,335
Liabilities assumed	(96,868)
Net assets acquired	262,467
Purchase price	447,192
Goodwill, excess of purchase price	$ 184,725

Amount of assets acquired at the acquisition date.

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-Name Accounting Standards Codification
-Topic 805
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Amount of liabilities assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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