Note 12 - Subordinated Notes (Details) $ in Thousands				12 Months Ended
	Sep. 14, 2020 USD ($)	Aug. 15, 2019	Feb. 12, 2019 USD ($)	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Subordinated Borrowing [Line Items]
Total Subordinated Debentures				$ 113,850	$ 118,691
Gross proceeds			$ 65,000
Proceeds from subordinated notes	$ 50,000		$ 63,400		50,000	$ 63,393
Fixed rate			5.375%
Redemption price percentage	100.00%		100.00%
Fixed term		5 years
Debt issuance costs				(1,150)	(1,309)
Interest Rate Period One [Member]
Subordinated Borrowing [Line Items]
Fixed rate	5.125%
Subordinated debenture dated 9/14/20 [Member]
Subordinated Borrowing [Line Items]
Total Subordinated Debentures				$ 50,000	$ 50,000
Interest Rate				5.125%	5.125%
Subordinated debenture dated 2/1/19 [Member]
Subordinated Borrowing [Line Items]
Total Subordinated Debentures				$ 65,000	$ 65,000
Interest Rate				5.375%	5.375%
Subordinated debenture dated 4/30/16 [Member]
Subordinated Borrowing [Line Items]
Total Subordinated Debentures					$ 2,000
Interest Rate					4.00%
Subordinated debenture dated 9/15/16 [Member]
Subordinated Borrowing [Line Items]
Total Subordinated Debentures					$ 3,000
Interest Rate					4.00%
Revolving line of credit
Subordinated Borrowing [Line Items]
Retirement of subordinated debt				$ 21,300
Outstanding amount line of credit				$ 0
Springfield Bancshares
Subordinated Borrowing [Line Items]
Number of subordinated debentures assumed | item				2
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Interest Rate Period Two [Member]
Subordinated Borrowing [Line Items]
Debt Instrument, Description of Variable Rate Basis	SOFR
Basis points	5.00%
London Interbank Offered Rate (LIBOR)
Subordinated Borrowing [Line Items]
Basis points			2.82%
Subordinated debentures
Subordinated Borrowing [Line Items]
Fair value of subordinated debentures				$ 4,800
Subordinated debentures | Revolving line of credit
Subordinated Borrowing [Line Items]
Outstanding amount line of credit				$ 9,000