Note 11 - Fair Value Measurements (Details Textual) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument, Fair Value Disclosure, Total	$ 270.0	$ 323.4
Debt and Lease Obligation, Total	$ 268.4	$ 308.5

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Section 50
-Paragraph 1D
-Subparagraph (c)
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant