Note 18 - Condensed Financial Information - Parent Company Only - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Feb. 08, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Net income		$ 3,488	$ 2,403	$ 2,549	$ 2,635	$ 7,068	$ 1,850	$ 2,412	$ 2,019
Equity in trust										$ (13)	$ (12)
(Decrease) increase in accrued interest payable										(80)	97
Increase in prepaid expenses and other assets										(2,107)	(2,347)
Decrease in director indemnification liability											(2,553)
Net cash provided by operating activities										14,652	23,150
Net cash provided by (used in) investing activities										37,061	(88,818)
Proceeds from issuance of common shares, net of discount	$ 21,300									21,342	117
Cash dividends paid										(4,030)	(2,857)
Net cash provided by (used in) financing activities										(53,629)	64,403
Net increase in cash										(1,916)	(1,265)
Cash and cash equivalents at beginning of year					36,481				37,746	36,481	37,746
Cash and cash equivalents at end of year		34,565				36,481				34,565	36,481
Parent Company [Member]
Net income										11,075	13,349
Equity in undistributed income of subsidiary										(1,714)	(2,167)
Equity in trust										(13)	(12)
(Decrease) increase in accrued interest payable										(22)	3
Increase in prepaid expenses and other assets										467	65
Decrease in director indemnification liability											(2,553)
Increase (decrease) in other liabilities										12	(30)
Net cash provided by operating activities										9,805	8,655
Investment in Subsidiary										(17,750)
Net cash provided by (used in) investing activities										(17,750)
Principal reduction on subordinated debentures										(5,000)
Proceeds from issuance of common shares, net of discount										21,342	117
Cash dividends paid										(4,030)	(2,857)
Net cash provided by (used in) financing activities										12,312	(2,740)
Net increase in cash										4,367	5,915
Cash and cash equivalents at beginning of year					$ 5,976				$ 61	5,976	61
Cash and cash equivalents at end of year		$ 10,343				$ 5,976				$ 10,343	$ 5,976