Note 13 - Intrinsic Value Related to Stock Options Exercised (Details) $ in Thousands	12 Months Ended
Dec. 31, 2021 USD ($)
Tax Benefits and Intrinsic Value Related to Stock Options Exercised [Abstract]
Intrinsic value of stock options exercised	$ 31

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration