Note 3 - Investment Securities - Schedule of Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 13,772	$ 2,274
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	324	26
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	243,539	273,213
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	23,977	28,181
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	2,283	6,012
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Accumulated Loss	17	476
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	12,233	8,941
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1,379	712
US Treasury Securities [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	3,232	0
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	62,948	68,202
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	4,754	6,202
US Government Corporations and Agencies Securities [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	3,991	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	137	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	73,526	80,901
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	6,116	8,077
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	743	734
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	7	16
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	6,258	5,800
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	442	900
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	5,806	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	180	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	63,539	72,287
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	9,146	8,846
Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	0	1,540
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	10
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	3,982	5,631
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	266	235
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	2,283	6,012
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Accumulated Loss	17	476
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	9,578	5,975
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	905	396
Taxable Municipal Bonds [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer	33,286	40,392
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3,253	3,921
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Fair Value	0	0
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, Less Than 12 Months, Accumulated Loss	0	0
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	2,655	2,966
Debt Security, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 474	$ 316