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Note 2 - Investments - Schedule of Investments in Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Less than 12 months, fair value, available for sale securities $ 61,184 $ 43,189
Less than 12 months, unrealized loss, available for sale securities (529) (511)
12 months or longer, unrealized loss, fair value, available for sale securities 160,017 160,221
12 months or longer, unrealized loss, available for sale securities (23,836) (29,057)
Available for sale securities, fair value, total 221,201 203,410
Available for sale securities, unrealized losses (24,365) (29,568)
Less than 12 months, fair value, held to maturity 5,594 0
Less than 12 months, unrealized loss, held to maturity securities (22) 0
12 months or longer, unrealized loss, fair value, held to maturity securities 940 8,144
12 months or longer, unrealized loss, held to maturity securities (60) (356)
Held to maturity securities, fair value 6,534 8,144
Held-to-maturity, unrealized losses (82) (356)
Less than 12 months, fair value 66,778 43,189
Less than 12 months, unrealized loss (551) (511)
12 months or longer, fair value 160,957 168,365
12 months or longer, unrealized loss (23,896) (29,413)
Debt Securities, fair value, total 227,735 211,554
Debt securities, unrealized loss (24,447) (29,924)
US Government Agencies Debt Securities [Member]    
Less than 12 months, fair value, available for sale securities 0 0
Less than 12 months, unrealized loss, available for sale securities 0 0
12 months or longer, unrealized loss, fair value, available for sale securities 15,957 15,093
12 months or longer, unrealized loss, available for sale securities (2,303) (3,154)
Available for sale securities, fair value, total 15,957 15,093
Available for sale securities, unrealized losses (2,303) (3,154)
Corporate Debt Securities [Member]    
Less than 12 months, fair value, available for sale securities 5,997 6,781
Less than 12 months, unrealized loss, available for sale securities (3) (219)
12 months or longer, unrealized loss, fair value, available for sale securities 5,447 5,337
12 months or longer, unrealized loss, available for sale securities (553) (663)
Available for sale securities, fair value, total 11,444 12,118
Available for sale securities, unrealized losses (556) (882)
Less than 12 months, fair value, held to maturity 5,594 0
Less than 12 months, unrealized loss, held to maturity securities (22) 0
12 months or longer, unrealized loss, fair value, held to maturity securities 940 8,144
12 months or longer, unrealized loss, held to maturity securities (60) (356)
Held to maturity securities, fair value 6,534 8,144
Held-to-maturity, unrealized losses (82) (356)
Municipal Bonds [Member]    
Less than 12 months, fair value, available for sale securities 487 1,677
Less than 12 months, unrealized loss, available for sale securities 0 (10)
12 months or longer, unrealized loss, fair value, available for sale securities 69,387 68,667
12 months or longer, unrealized loss, available for sale securities (11,225) (12,420)
Available for sale securities, fair value, total 69,874 70,344
Available for sale securities, unrealized losses (11,225) (12,430)
Collateralized Mortgage-Backed Securities [Member]    
Less than 12 months, fair value, available for sale securities 50,987 31,093
Less than 12 months, unrealized loss, available for sale securities (508) (241)
12 months or longer, unrealized loss, fair value, available for sale securities 62,610 63,934
12 months or longer, unrealized loss, available for sale securities (9,072) (11,728)
Available for sale securities, fair value, total 113,597 95,027
Available for sale securities, unrealized losses (9,580) (11,969)
Asset-Backed Securities [Member]    
Less than 12 months, fair value, available for sale securities 3,713 3,638
Less than 12 months, unrealized loss, available for sale securities (18) (41)
12 months or longer, unrealized loss, fair value, available for sale securities 6,616 7,190
12 months or longer, unrealized loss, available for sale securities (683) (1,092)
Available for sale securities, fair value, total 10,329 10,828
Available for sale securities, unrealized losses $ (701) $ (1,133)