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Note 14 - Income Taxes (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Unrecognized Tax Benefits, Ending Balance	$ 5.4
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0.7
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 5.3
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Year	2018 2017 2018 2019 2020
Foreign Tax Authority [Member]
Open Tax Year	2015 2016 2017 2018 2019 2020
State and Local Jurisdiction [Member]
Open Tax Year	2015 2016 2017 2018 2019 2020

X

- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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X

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (b)
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