Note 11 - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Allowance for loan losses	$ 2,076	$ 1,855
Net unrealized holding losses on investment securities available-for-sale	0	1,896
Fair value adjustment on equity securities	0	190
Non-accrual interest income	54	76
Deferred rent	0	59
Deferred revenue	71	121
Incurred but not reported medical expense	31	33
Bonus	218	178
State net operating loss carryforward	0	29
Other	33	27
Total deferred tax assets	2,483	4,464
Deferred tax liabilities
Deferred loan costs	369	361
Depreciation	289	179
Mortgage servicing rights	92	95
Net unrealized holding losses on investment securities available-for-sale	68	0
Fair value adjustment on equity securities	32	0
Prepaid expenses	151	92
Deferred rent	23	0
Other	18	13
Total deferred tax liabilities	1,042	740
Net deferred tax asset	$ 1,441	$ 3,724