Note 7 - Deposits - Maturity Distribution for Certificate of Deposits (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
In one year or less	$ 260,501,000	$ 327,246,000
In one to two years	78,024,000	139,801,000
In two to three years	34,595,000	39,801,000
In three to four years	7,863,000	25,577,000
In four to five years	50,914,000	22,690,000
Total certificates of deposit	$ 431,897,000	$ 555,115,000