Note 2 - Investments - Schedule of Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Available-for-Sale, Amortized Cost	$ 252,272	$ 328,695
Total securities available-for-sale, fair value	228,199	292,933
Total securities held-to-maturity, amortized cost	8,500	8,500
Total securities held-to-maturity, fair value	7,983	7,666
Total securities, amortized cost	260,772	337,195
Total securities, fair value	236,182	300,599
US Government Agencies Debt Securities [Member]
Due within one year, amortized cost	0	922
Due within one year, fair value	0	914
Due after one year through five years, amortized cost	4,958	3,947
Due after one year through five years, fair value	4,663	3,544
Due after five years through ten years, amortized cost	10,974	11,972
Due after five years through ten years, fair value	9,470	10,139
Due after ten years, amortized cost	4,310	4,310
Due after ten years, fair value	3,549	3,421
Subtotal, amortized cost	20,242	21,151
Subtotal, fair value	17,682	18,018
Available-for-Sale, Amortized Cost	20,242	21,151
Total securities available-for-sale, fair value	17,682	18,018
Corporate Debt Securities [Member]
Due within one year, amortized cost	0	1,000
Due within one year, fair value	0	1,004
Due after one year through five years, amortized cost	10,000	6,000
Due after one year through five years, fair value	10,004	6,609
Due after five years through ten years, amortized cost	4,000	4,000
Due after five years through ten years, fair value	3,944	3,839
Due after ten years, amortized cost	2,000	2,000
Due after ten years, fair value	1,456	1,420
Subtotal, amortized cost	16,000	13,000
Subtotal, fair value	15,404	12,872
Available-for-Sale, Amortized Cost	16,000	13,000
Total securities available-for-sale, fair value	15,404	12,872
Due after five years through ten years, amortized cost, held to maturity	8,500	8,500
Due after five years through ten years, fair value, held to maturity	7,983	7,666
Municipal Bonds [Member]
Due within one year, amortized cost	0	1,013
Due within one year, fair value	0	1,003
Due after one year through five years, amortized cost	74	757
Due after one year through five years, fair value	74	751
Due after five years through ten years, amortized cost	6,295	7,603
Due after five years through ten years, fair value	5,991	7,101
Due after ten years, amortized cost	76,691	129,430
Due after ten years, fair value	66,261	110,592
Subtotal, amortized cost	83,060	138,803
Subtotal, fair value	72,326	119,447
Available-for-Sale, Amortized Cost	83,060	138,803
Total securities available-for-sale, fair value	72,326	119,447
Collateralized Mortgage-Backed Securities [Member]
Without single maturity date, amortized cost	120,136	112,855
Without single maturity date, fair value	110,919	101,248
Available-for-Sale, Amortized Cost	120,136	112,855
Total securities available-for-sale, fair value	110,919	101,248
Collateralized Mortgage-Backed Securities [Member] \| Federal National Mortgage Association (FNMA) [Member]
Without single maturity date, amortized cost	82,062	76,369
Without single maturity date, fair value	73,923	66,275
Collateralized Mortgage-Backed Securities [Member] \| Federal Home Loan Mortgage Corporation (FHLMC) [Member]
Without single maturity date, amortized cost	27,525	32,311
Without single maturity date, fair value	26,911	31,376
Collateralized Mortgage-Backed Securities [Member] \| Government National Mortgage Association (GNMA) [Member]
Without single maturity date, amortized cost	10,549	4,175
Without single maturity date, fair value	10,085	3,597
U.S. Small Business Administration Securities [Member]
Due within one year, amortized cost	203	198
Due within one year, fair value	200	196
Due after one year through five years, amortized cost	1,073	1,860
Due after one year through five years, fair value	1,046	1,824
Due after five years through ten years, amortized cost	2,868	21,420
Due after five years through ten years, fair value	2,679	20,929
Due after ten years, amortized cost	8,690	19,408
Due after ten years, fair value	7,943	18,399
Subtotal, amortized cost	12,834	42,886
Subtotal, fair value	11,868	41,348
Available-for-Sale, Amortized Cost	12,834	42,886
Total securities available-for-sale, fair value	$ 11,868	$ 41,348

Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

No definition available.