Note 9 - Derivative Instruments and Hedging Activities (Details Textual) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Foreign Exchange Forward [Member]
Derivative, Notional Amount	$ 17.3	$ 17.1
The 2021 Swaps One [Member]
Derivative, Notional Amount	$ 30.0
Derivative, Fixed Interest Rate	1.3055%	1.3055%
The 2021 Swaps Two [Member]
Derivative, Notional Amount	$ 30.0
Derivative, Fixed Interest Rate	1.318%	1.318%

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant