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Note 2 - Newly Adopted Accounting Pronouncements (Details Textual) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | --- | ---
Operating Lease, Right-of-Use Asset | $ 44.5 | $ 46.6 |
Operating Lease, Liability, Total | $ 45.0 |  |
Accounting Standards Update 2016-02 [Member] |  |  |
Operating Lease, Right-of-Use Asset |  |  | $ 44.8
Operating Lease, Liability, Total |  |  | $ 44.8

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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Period Type: | instant

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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