Note 19 - Parent Company Financial Information - Statements of Income, Comprehensive Income (Loss), and Changes in Shareholders' Equity (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income		$ 25,721	$ 22,930	$ 22,427	$ 20,754	$ 19,914	$ 19,382	$ 19,371	$ 19,140	$ 91,832	$ 77,807	$ 75,904
Net loss before taxes										6,444	(4,850)	10,205
Provision (benefit) for income taxes		1,548	(503)	675	(330)	(1,031)	(516)	105	92	1,390	(1,350)	1,578
Net income (loss)		4,101	$ (967)	$ 2,512	(593)	(2,485)	$ (1,822)	$ 381	426	5,054	(3,500)	8,627
Total other comprehensive income (loss)										4,512	4,586	(2,778)
Total comprehensive income										9,566	1,086	5,849
Shareholders’ equity, beginning of year					249,168				245,189	249,168	245,189	226,460
Stock based compensation										1,918	2,632	2,116
Exercise of stock options										41	261	670
Conversion of subordinated debt to common shares												10,094
Proceeds from shares issued under preferred stock offering (2,000,000 shares) net of offering costs of $1,675										48,325
Preferred stock dividends	[1]									(923)
Return of short swing profit										18
Shareholders’ equity, end of year		308,113				249,168				308,113	249,168	245,189
Parent Company [Member]
Interest income										9	14	13
Total income										9	14	13
Trust preferred interest expense										297	476	441
Other expenses										2,805	3,662	4,972
Total expenses										3,102	4,138	5,413
Net loss before taxes										(3,093)	(4,124)	(5,400)
Provision (benefit) for income taxes										(703)	(917)	(1,640)
Loss before undistributed income of subsidiaries										(2,390)	(3,207)	(3,760)
Equity in undistributed income of subsidiaries										7,444	(293)	12,387
Net income (loss)										5,054	(3,500)	8,627
Total other comprehensive income (loss)										4,512	4,586	(2,778)
Total comprehensive income										9,566	1,086	5,849
Shareholders’ equity, beginning of year					$ 249,168				$ 245,189	249,168	245,189	226,460
Stock based compensation										1,918	2,632	2,116
Exercise of stock options										41	261	670
Conversion of subordinated debt to common shares										0	0	10,094
Preferred stock dividends										(923)	0	0
Return of short swing profit										18
Shareholders’ equity, end of year		$ 308,113				$ 249,168				308,113	249,168	245,189
Parent Company [Member] | Series A Preferred Stock [Member]
Proceeds from shares issued under preferred stock offering (2,000,000 shares) net of offering costs of $1,675										$ 48,325	$ 0	$ 0

[1] Dividends per share of $0.46 were declared on preferred stock for the twelve months ended December 31, 2020