Note 5 - Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Balance, beginning of period	$ 21,088	$ 20,423	$ 20,859	$ 20,363
Provision for loan losses	941	114	492	514
Loans charged off	(131)	(155)	(460)	(560)
Recoveries	56	63	1,063	128
Balance, end of period	21,954	20,445	21,954	20,445
Ending allowance balance for loans individually evaluated for impairment	312	281	312	281
Allowance for loan losses	21,954	20,445	21,954	20,445	$ 20,859
Ending allowance balance for loans collectively evaluated for impairment	21,486	19,954	21,486	19,954
Balance of loans individually evaluated for impairment	18,053	23,840	18,053	23,840
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	1,894,441		1,894,441		1,851,153
Balance of loans collectively evaluated for impairment	1,896,680	1,921,189	1,896,680	1,921,189
Total period-end balance	1,916,395	1,947,820	1,916,395	1,947,820
Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	156	210	156	210
Allowance for loan losses	156	210	156	210
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	1,662	2,791	1,662	2,791
Commercial Portfolio Segment [Member]
Balance, beginning of period	4,356	4,226	4,411	4,558
Provision for loan losses	493	154	(184)	32
Loans charged off	(83)	(88)	(369)	(303)
Recoveries	10	14	918	19
Balance, end of period	4,776	4,306	4,776	4,306
Ending allowance balance for loans individually evaluated for impairment	242	0	242	0
Allowance for loan losses	4,776	4,306	4,776	4,306	4,411
Ending allowance balance for loans collectively evaluated for impairment	4,534	4,306	4,534	4,306
Balance of loans individually evaluated for impairment	5,147	10,861	5,147	10,861
Balance of loans collectively evaluated for impairment	338,208	359,342	338,208	359,342
Total period-end balance	343,355	370,203	343,355	370,203
Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	0	0	0	0
Allowance for loan losses	0	0	0	0
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	0	0	0	0
Consumer Portfolio Segment [Member]
Balance, beginning of period	319	447	354	540
Provision for loan losses	60	(6)	60	(85)
Loans charged off	(48)	(43)	(95)	(99)
Recoveries	8	31	20	73
Balance, end of period	339	429	339	429
Ending allowance balance for loans individually evaluated for impairment	70	106	70	106
Allowance for loan losses	339	429	339	429	354
Ending allowance balance for loans collectively evaluated for impairment	269	323	269	323
Balance of loans individually evaluated for impairment	160	246	160	246
Balance of loans collectively evaluated for impairment	14,260	22,256	14,260	22,256
Total period-end balance	14,480	22,570	14,480	22,570
Consumer Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	0	0	0	0
Allowance for loan losses	0	0	0	0
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	60	68	60	68
Construction Loans [Member] | Real Estate Portfolio Segment [Member]
Balance, beginning of period	2,408	2,245	2,347	2,375
Provision for loan losses	217	23	262	(117)
Loans charged off	0	(11)	0	(11)
Recoveries	5	3	21	13
Balance, end of period	2,630	2,260	2,630	2,260
Ending allowance balance for loans individually evaluated for impairment	0	0	0	0
Allowance for loan losses	2,630	2,260	2,630	2,260	2,347
Ending allowance balance for loans collectively evaluated for impairment	2,630	2,260	2,630	2,260
Balance of loans individually evaluated for impairment	498	828	498	828
Balance of loans collectively evaluated for impairment	214,045	212,242	214,045	212,242
Total period-end balance	214,543	213,070	214,543	213,070
Construction Loans [Member] | Real Estate Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	0	0	0	0
Allowance for loan losses	0	0	0	0
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	0	0	0	0
1-4 Family [Member] | Real Estate Portfolio Segment [Member]
Balance, beginning of period	3,404	3,369	3,337	3,370
Provision for loan losses	187	(152)	184	(25)
Loans charged off	0	0	0	(134)
Recoveries	32	14	102	20
Balance, end of period	3,623	3,231	3,623	3,231
Ending allowance balance for loans individually evaluated for impairment	0	0	0	0
Allowance for loan losses	3,623	3,231	3,623	3,231	3,337
Ending allowance balance for loans collectively evaluated for impairment	3,623	3,231	3,623	3,231
Balance of loans individually evaluated for impairment	780	2,637	780	2,637
Balance of loans collectively evaluated for impairment	378,929	372,668	378,929	372,668
Total period-end balance	380,028	375,690	380,028	375,690
1-4 Family [Member] | Real Estate Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	0	0	0	0
Allowance for loan losses	0	0	0	0
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	319	385	319	385
Multifamily Loans [Member] | Real Estate Portfolio Segment [Member]
Balance, beginning of period	590	696	673	589
Provision for loan losses	50	(23)	(33)	84
Loans charged off	0	0	0	0
Recoveries	0	0	0	0
Balance, end of period	640	673	640	673
Ending allowance balance for loans individually evaluated for impairment	0	0	0	0
Allowance for loan losses	640	673	640	673	673
Ending allowance balance for loans collectively evaluated for impairment	640	673	640	673
Balance of loans individually evaluated for impairment	0	0	0	0
Balance of loans collectively evaluated for impairment	56,491	60,309	56,491	60,309
Total period-end balance	56,491	60,309	56,491	60,309
Multifamily Loans [Member] | Real Estate Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	0	0	0	0
Allowance for loan losses	0	0	0	0
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	0	0	0	0
Farmland [Member] | Real Estate Portfolio Segment [Member]
Balance, beginning of period	342	395	383	435
Provision for loan losses	(29)	16	(16)	(24)
Loans charged off	0	(13)	(54)	(13)
Recoveries	0	0	0	0
Balance, end of period	313	398	313	398
Ending allowance balance for loans individually evaluated for impairment	0	0	0	0
Allowance for loan losses	313	398	313	398	383
Ending allowance balance for loans collectively evaluated for impairment	157	188	157	188
Balance of loans individually evaluated for impairment	66	297	66	297
Balance of loans collectively evaluated for impairment	14,961	20,265	14,961	20,265
Total period-end balance	15,676	22,263	15,676	22,263
Farmland [Member] | Real Estate Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	156	210	156	210
Allowance for loan losses	156	210	156	210
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	649	1,701	649	1,701
Commercial Real Estate Loan [Member] | Real Estate Portfolio Segment [Member]
Balance, beginning of period	9,669	9,045	9,354	8,496
Provision for loan losses	(37)	102	219	649
Loans charged off	0	0	(58)	0
Recoveries	1	1	2	3
Balance, end of period	9,633	9,148	9,633	9,148
Ending allowance balance for loans individually evaluated for impairment	0	175	0	175
Allowance for loan losses	9,633	9,148	9,633	9,148	$ 9,354
Ending allowance balance for loans collectively evaluated for impairment	9,633	8,973	9,633	8,973
Balance of loans individually evaluated for impairment	11,402	8,971	11,402	8,971
Balance of loans collectively evaluated for impairment	879,786	874,107	879,786	874,107
Total period-end balance	891,822	883,715	891,822	883,715
Commercial Real Estate Loan [Member] | Real Estate Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance, end of period	0	0	0	0
Allowance for loan losses	0	0	0	0
Loans, net of allowance for loan losses of $21,954 and $20,859, respectively	$ 634	$ 637	$ 634	$ 637