Note 20 - Parent Only Condensed Financial Statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest receivable and other assets	$ 22,062	$ 18,797
Total assets	1,147,785	1,094,887
Interest payable and other liabilities	15,286	9,354
Total liabilities	1,035,215	995,849
Common stock, no par value; 50,000,000 shares authorized, 8,210,147 and 8,194,805 shares issued and outstanding at December 31, 2019 and 2018, respectively	25,435	25,429
Retained earnings	80,961	70,686
Accumulated other comprehensive income (loss), net of tax	2,397	(435)
Total shareholders’ equity	112,570	99,038	$ 90,767
Total liabilities and shareholders' equity	1,147,785	1,094,887
Parent Company [Member]
Cash	149	281
Investment in bank subsidiary	112,373	98,678
Interest receivable and other assets	48	107
Total assets	112,570	99,066
Interest payable and other liabilities		28
Total liabilities		28
Common stock, no par value; 50,000,000 shares authorized, 8,210,147 and 8,194,805 shares issued and outstanding at December 31, 2019 and 2018, respectively	25,435	25,429
Additional paid-in capital	3,777	3,358
Retained earnings	80,961	70,686
Accumulated other comprehensive income (loss), net of tax	2,397	(435)
Total shareholders’ equity	112,570	99,038
Total liabilities and shareholders' equity	$ 112,570	$ 99,066