Note 2 - Investment Securities - Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized cost	$ 107,981	$ 32,771
Unrealized gains	702	767
Unrealized losses	(1,261)	(31)
Investment securities available for sale	107,422	33,507
US Government Agencies Debt Securities [Member]
Amortized cost	15,295
Unrealized gains	28
Unrealized losses	(84)
Investment securities available for sale	15,239
Collateralized Mortgage Backed Securities [Member]
Amortized cost	56,124	15,212
Unrealized gains	377	472
Unrealized losses	(795)	0
Investment securities available for sale	55,706	15,684
Corporate Debt Securities [Member]
Amortized cost	1,500	1,500
Unrealized gains	0	0
Unrealized losses	0	0
Investment securities available for sale	1,500	1,500
US States and Political Subdivisions Debt Securities [Member]
Amortized cost	35,062	16,059
Unrealized gains	297	295
Unrealized losses	(382)	(31)
Investment securities available for sale	$ 34,977	$ 16,323

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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