Note 4 - Allowance for Loan Losses and Impaired Loans - Allowance for Loan Losses and Recorded Investment (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Balance	$ 5,051	$ 4,252	$ 4,900	$ 3,893
Charge-offs	(17)	(25)	(51)	(78)
Recoveries	113	13	136	103
Provision for Loan and Lease Losses, Total	195	414	357	736
Balance	5,342	4,654	5,342	4,654
Ending balance: individually evaluated for impairment	0		0		$ 0
Ending balance: collectively evaluated for impairment	5,342		5,342		4,900
Loans receivable, gross	697,379		697,379		664,095
Construction and Development Loan [Member]
Balance	502	341	499	305
Charge-offs	0	0	0	0
Recoveries	2	0	2	4
Provision for Loan and Lease Losses, Total	(76)	74	(73)	106
Balance	428	415	428	415
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	428		428		499
Loans receivable, gross	40,954		40,954		46,053
Allowance for loan losses, ending balance: individually evaluated for impairment	741		741		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	40,213		40,213		46,053
Construction and Development Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	0		0		0
Farmland Loan [Member]
Balance	384	465	406	487
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for Loan and Lease Losses, Total	(40)	7	(62)	(15)
Balance	344	472	344	472
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	344		344		406
Loans receivable, gross	30,447		30,447		32,449
Allowance for loan losses, ending balance: individually evaluated for impairment	2,417		2,417		2,580
Allowance for loan losses, ending balance: collectively evaluated for impairment	28,030		28,030		29,869
Farmland Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	0		0		0
Residential Loan [Member]
Balance	2,247	1,998	2,167	1,822
Charge-offs	0	0	0	0
Recoveries	0	3	2	11
Provision for Loan and Lease Losses, Total	73	125	151	293
Balance	2,320	2,126	2,320	2,126
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	2,320		2,320		2,167
Loans receivable, gross	287,643		287,643		279,893
Allowance for loan losses, ending balance: individually evaluated for impairment	0		0		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	287,504		287,504		279,751
Residential Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	139		139		142
Commercial Mortgage Loan [Member]
Balance	1,557	1,054	1,421	924
Charge-offs	0	0	0	0
Recoveries	61	0	61	65
Provision for Loan and Lease Losses, Total	225	(3)	361	62
Balance	1,843	1,051	1,843	1,051
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	1,843		1,843		1,421
Loans receivable, gross	228,288		228,288		203,886
Allowance for loan losses, ending balance: individually evaluated for impairment	0		0		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	228,181		228,181		203,773
Commercial Mortgage Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	107		107		113
Commercial and Agricultural Loan [Member]
Balance	259	246	293	211
Charge-offs	0	0	0	0
Recoveries	44	0	45	2
Provision for Loan and Lease Losses, Total	(30)	204	(65)	237
Balance	273	450	273	450
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	273		273		293
Loans receivable, gross	31,962		31,962		33,663
Allowance for loan losses, ending balance: individually evaluated for impairment	0		0		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	31,866		31,866		33,567
Commercial and Agricultural Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	96		96		96
Consumer and Other Loan [Member]
Balance	102	148	114	144
Charge-offs	(17)	(25)	(51)	(78)
Recoveries	6	10	26	21
Provision for Loan and Lease Losses, Total	43	7	45	53
Balance	134	$ 140	134	$ 140
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	134		134		114
Loans receivable, gross	16,631		16,631		17,033
Allowance for loan losses, ending balance: individually evaluated for impairment	0		0		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	16,631		16,631		17,033
Consumer and Other Loan [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	0		0		0
Loans Excluding SBA PPP Loans [Member]
Loans receivable, gross	635,925		635,925		612,977
Allowance for loan losses, ending balance: individually evaluated for impairment	3,158		3,158		2,580
Allowance for loan losses, ending balance: collectively evaluated for impairment	632,425		632,425		610,046
Loans Excluding SBA PPP Loans [Member] \| Financial Asset Acquired with Credit Deterioration [Member]
Balance			0
Balance	0		0
Loans receivable, gross	$ 342		$ 342		$ 351

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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