Note 3 - Securities - Securities With Unrealized Losses (Details) $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Count, less than 12 months	18	180
Collateralized mortgage obligations - residential, fair value	$ 44,131	$ 148,388
Unrealized loss, less than 12 months	$ (396)	$ (4,581)
Count, 12 months or more	198	54
Fair value, 12 months or more	$ 121,812	$ 58,835
Unrealized loss, 12 months or more	$ (6,270)	$ (3,707)
Count, total	216	234
Fair value, total	$ 165,943	$ 207,223
Unrealized loss, total	$ (6,666)	$ (8,288)
US States and Political Subdivisions Debt Securities [Member]
Count, less than 12 months	0	1
Collateralized mortgage obligations - residential, fair value	$ 0	$ 225
Unrealized loss, less than 12 months	$ 0	$ (15)
Count, 12 months or more	1	0
Fair value, 12 months or more	$ 226	$ 0
Unrealized loss, 12 months or more	$ (14)	$ 0
Count, total	1	1
Fair value, total	$ 226	$ 225
Unrealized loss, total	$ (14)	$ (15)
US Treasury Securities [Member]
Count, less than 12 months	1	147
Collateralized mortgage obligations - residential, fair value	$ 3,652	$ 104,439
Unrealized loss, less than 12 months	$ (103)	$ (4,104)
Count, 12 months or more	180	53
Fair value, 12 months or more	$ 118,375	$ 58,664
Unrealized loss, 12 months or more	$ (6,101)	$ (3,699)
Count, total	181	200
Fair value, total	$ 122,027	$ 163,103
Unrealized loss, total	$ (6,204)	$ (7,803)
US Government-sponsored Enterprises Debt Securities [Member]
Count, less than 12 months	9	9
Collateralized mortgage obligations - residential, fair value	$ 39,727	$ 39,699
Unrealized loss, less than 12 months	$ (273)	$ (301)
Count, 12 months or more	0	0
Fair value, 12 months or more	$ 0	$ 0
Unrealized loss, 12 months or more	$ 0	$ 0
Count, total	9	9
Fair value, total	$ 39,727	$ 39,699
Unrealized loss, total	$ (273)	$ (301)
Residential Mortgage-Backed Securities [Member]
Count, less than 12 months	8	18
Collateralized mortgage obligations - residential, fair value	$ 752	$ 3,016
Unrealized loss, less than 12 months	$ (20)	$ (143)
Count, 12 months or more	10	0
Fair value, 12 months or more	$ 2,118	$ 0
Unrealized loss, 12 months or more	$ (133)	$ 0
Count, total	18	18
Fair value, total	$ 2,870	$ 3,016
Unrealized loss, total	$ (153)	$ (143)
Collateralized Mortgage-Backed Securities [Member]
Count, less than 12 months	0	5
Collateralized mortgage obligations - residential, fair value	$ 0	$ 1,009
Unrealized loss, less than 12 months	$ 0	$ (18)
Count, 12 months or more	7	1
Fair value, 12 months or more	$ 1,093	$ 171
Unrealized loss, 12 months or more	$ (22)	$ (8)
Count, total	7	6
Fair value, total	$ 1,093	$ 1,180
Unrealized loss, total	$ (22)	$ (26)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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