Note 2 - Recent Accounting Pronouncements (Details Textual) - USD ($)		3 Months Ended
	Jan. 01, 2023	Mar. 31, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 129,808,000	$ 132,598,000	$ 128,951,000
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]	Accounting Standards Update 2016-13 [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 857,000