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Note 10 - Income Taxes (Details Textual) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Unrecognized Tax Benefits, Ending Balance | $ 26.9 |  | $ 28.5
Liability for Uncertainty in Income Taxes, Current |  |  | 2.4
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | 0.4 | $ 0.4 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | $ 4.6 |  | $ 5.2
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Open Tax Year | 2017 2018 2019 2020 |  |
State and Local Jurisdiction [Member] |  |  |
Open Tax Year | 2014 2015 2016 2017 2018 2019 2020 |  |
Foreign Tax Authority [Member] | Asia [Member] |  |  |
Open Tax Year | 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 |  |
Foreign Tax Authority [Member] | Europe [Member] |  |  |
Open Tax Year | 2012 2013 2014 2015 2016 2017 2018 2019 2020 |  |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to repatriation of foreign earnings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Amount recognized for uncertainty in income taxes classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY 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=121826272&loc=d3e32718-109319 + Details
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