Note 11 - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets
Allowance for loan losses	$ 2,212,000	$ 2,349,000
Net unrealized holding losses on investment securities available-for-sale	21,565,000	994,000
Fair value adjustment on equity securities	10,000	0
Non-accrual interest income	52,000	32,000
Leasing liability	678,000	788,000
Deferred revenue	7,000	23,000
Incurred but not reported medical expense	28,000	31,000
Bonus	128,000	248,000
Other	48,000	54,000
Total deferred tax assets	24,728,000	4,519,000
Deferred tax liabilities
Deferred loan income	459,000	430,000
Depreciation	225,000	295,000
Mortgage servicing rights	98,000	110,000
Fair value adjustment on equity securities	0	286,000
Prepaid expenses	232,000	214,000
Right of use asset	611,000	719,000
Other	18,000	16,000
Total deferred tax liabilities	1,643,000	2,070,000
Valuation allowance	8,000	0
Net deferred tax asset	$ 23,077,000	$ 2,449,000