Note 5 - Loans Receivable - Components of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans receivable	$ 570,353	$ 536,465
Allowance for loan losses	(3,893)	(3,495)	$ (3,453)
Loans, net of allowance for loan losses	566,460	532,970
Construction and Development Loan [Member]
Loans receivable	39,649	33,449
Allowance for loan losses	(305)	(246)	(239)
Farmland Loan [Member]
Loans receivable	34,166	33,291
Allowance for loan losses	(487)	(385)	(358)
Residential Loan [Member]
Loans receivable	253,674	235,689
Allowance for loan losses	(1,822)	(1,807)	(1,875)
Commercial Mortgage Loan [Member]
Loans receivable	190,817	176,192
Allowance for loan losses	(924)	(682)	(619)
Commercial and Agricultural Loan [Member]
Loans receivable	32,426	37,491
Allowance for loan losses	(211)	(281)	(282)
Consumer and Other Loan [Member]
Loans receivable	19,621	20,353
Allowance for loan losses	$ (144)	$ (94)	$ (80)

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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