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Note 4 - Investment Securities - Expected Maturities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Less than one year, Available for sale, Amortized Cost | $ 76,153 | $ 53,256
Less than one year, Available for sale, Estimated Fair Value | 76,140 | 53,243
More than one year to five years, Available for sale, Amortized Cost | 92,104 | 73,970
Available for sale, Estimated Fair Value, More than one year to five years | 86,972 | 68,471
More than five years to ten years, Available for sale, Amortized Cost | 153,816 | 142,849
More than five years to ten years, Available for sale, Estimated Fair Value | 136,671 | 122,326
More than ten years, Available for sale, Amortized Cost | 24,997 | 18,013
More than ten years, Available for sale, Estimated Fair Value | 19,178 | 12,790
Available for sale, amortized cost | 347,070 | 288,088
Available for sale | 318,961 | 256,830
Less than one year, Held to Maturity, Amortized Cost | 0 | 501
Less than one year, Held to maturity, Estimated Fair Value | 0 | 498
More than one year to five years, Held to maturity, Amortized Cost | 501 | 502
More than one year to five years, Held to Maturity, Estimated Fair Value | 504 | 509
More than five years to ten years, Held to maturity Amortized Cost | 2,952 | 1,739
More than five years to ten years, Held to maturity Estimated Fair Value | 2,873 | 1,692
More than ten years, Held to Maturity, Amortized Cost | 1,756 | 2,987
More than ten years, Held to Maturity, Estimated Fair Value | 1,720 | 2,864
Held to maturity (fair value of $5,097 and $5,563 at December 31, 2023 and December 31, 2022) | 5,209 | 5,729
Securities held to maturity, fair value | 5,097 | 5,563
US Government Agencies Debt Securities [Member] |  |
Less than one year, Available for sale, Amortized Cost | 0 | 0
Less than one year, Available for sale, Estimated Fair Value | 0 | 0
More than one year to five years, Available for sale, Amortized Cost | 8,705 | 5,012
Available for sale, Estimated Fair Value, More than one year to five years | 8,161 | 4,495
More than five years to ten years, Available for sale, Amortized Cost | 0 | 0
More than five years to ten years, Available for sale, Estimated Fair Value | 0 | 0
More than ten years, Available for sale, Amortized Cost | 0 | 0
More than ten years, Available for sale, Estimated Fair Value | 0 | 0
Available for sale, amortized cost | 8,705 | 5,012
Available for sale | 8,161 | 4,495
Small Business Administration Agency Securities [Member] |  |
Less than one year, Available for sale, Amortized Cost | 0 | 0
Less than one year, Available for sale, Estimated Fair Value | 0 | 0
More than one year to five years, Available for sale, Amortized Cost | 2,292 | 2,634
Available for sale, Estimated Fair Value, More than one year to five years | 2,095 | 2,411
More than five years to ten years, Available for sale, Amortized Cost | 10,997 | 0
More than five years to ten years, Available for sale, Estimated Fair Value | 11,122 | 0
More than ten years, Available for sale, Amortized Cost | 0 | 0
More than ten years, Available for sale, Estimated Fair Value | 0 | 0
Available for sale, amortized cost | 13,289 | 2,634
Available for sale | 13,217 | 2,411
Residential Mortgage-Backed Securities [Member] |  |
Less than one year, Available for sale, Amortized Cost | 0 | 0
Less than one year, Available for sale, Estimated Fair Value | 0 | 0
More than one year to five years, Available for sale, Amortized Cost | 11,023 | 13,013
Available for sale, Estimated Fair Value, More than one year to five years | 9,986 | 11,598
More than five years to ten years, Available for sale, Amortized Cost | 19,762 | 29,114
More than five years to ten years, Available for sale, Estimated Fair Value | 16,965 | 24,361
More than ten years, Available for sale, Amortized Cost | 9,722 | 2,682
More than ten years, Available for sale, Estimated Fair Value | 7,701 | 2,098
Available for sale, amortized cost | 40,507 | 44,809
Available for sale | 34,652 | 38,057
Residential Collateralized Mortgage Obligations [Member] |  |
Less than one year, Available for sale, Amortized Cost | 18 | 0
Less than one year, Available for sale, Estimated Fair Value | 17 | 0
More than one year to five years, Available for sale, Amortized Cost | 36,876 | 20,687
Available for sale, Estimated Fair Value, More than one year to five years | 35,758 | 19,646
More than five years to ten years, Available for sale, Amortized Cost | 57,177 | 62,072
More than five years to ten years, Available for sale, Estimated Fair Value | 46,552 | 50,257
More than ten years, Available for sale, Amortized Cost | 0 | 0
More than ten years, Available for sale, Estimated Fair Value | 0 | 0
Available for sale, amortized cost | 94,071 | 82,759
Available for sale | 82,327 | 69,903
Commercial Collateralized Mortgage Obligations [Member] |  |
Less than one year, Available for sale, Amortized Cost | 3,014 | 0
Less than one year, Available for sale, Estimated Fair Value | 3,018 | 0
More than one year to five years, Available for sale, Amortized Cost | 20,296 | 16,382
Available for sale, Estimated Fair Value, More than one year to five years | 18,481 | 14,644
More than five years to ten years, Available for sale, Amortized Cost | 46,631 | 28,209
More than five years to ten years, Available for sale, Estimated Fair Value | 45,800 | 27,046
More than ten years, Available for sale, Amortized Cost | 0 | 0
More than ten years, Available for sale, Estimated Fair Value | 0 | 0
Available for sale, amortized cost | 69,941 | 44,591
Available for sale | 67,299 | 41,690
Commercial Paper [Member] |  |
Less than one year, Available for sale, Amortized Cost | 73,121 | 49,551
Less than one year, Available for sale, Estimated Fair Value | 73,105 | 49,537
More than one year to five years, Available for sale, Amortized Cost | 0 | 0
Available for sale, Estimated Fair Value, More than one year to five years | 0 | 0
More than five years to ten years, Available for sale, Amortized Cost | 0 | 0
More than five years to ten years, Available for sale, Estimated Fair Value | 0 | 0
More than ten years, Available for sale, Amortized Cost | 0 | 0
More than ten years, Available for sale, Estimated Fair Value | 0 | 0
Available for sale, amortized cost | 73,121 | 49,551
Available for sale | 73,105 | 49,537
Corporate Debt Securities [Member] |  |
Less than one year, Available for sale, Amortized Cost | 0 | 3,705
Less than one year, Available for sale, Estimated Fair Value | 0 | 3,706
More than one year to five years, Available for sale, Amortized Cost | 12,912 | 11,355
Available for sale, Estimated Fair Value, More than one year to five years | 12,491 | 10,806
More than five years to ten years, Available for sale, Amortized Cost | 19,249 | 23,454
More than five years to ten years, Available for sale, Estimated Fair Value | 16,232 | 20,662
More than ten years, Available for sale, Amortized Cost | 2,639 | 2,662
More than ten years, Available for sale, Estimated Fair Value | 1,968 | 1,838
Available for sale, amortized cost | 34,800 | 41,176
Available for sale | 30,691 | 37,012
Municipal Bonds [Member] |  |
Less than one year, Available for sale, Amortized Cost | 0 | 0
Less than one year, Available for sale, Estimated Fair Value | 0 | 0
More than one year to five years, Available for sale, Amortized Cost | 0 | 0
Available for sale, Estimated Fair Value, More than one year to five years | 0 | 0
More than five years to ten years, Available for sale, Amortized Cost | 0 | 0
More than five years to ten years, Available for sale, Estimated Fair Value | 0 | 0
More than ten years, Available for sale, Amortized Cost | 12,636 | 12,669
More than ten years, Available for sale, Estimated Fair Value | 9,509 | 8,854
Available for sale, amortized cost | 12,636 | 12,669
Available for sale | 9,509 | 8,854
Less than one year, Held to Maturity, Amortized Cost | 0 | 0
Less than one year, Held to maturity, Estimated Fair Value | 0 | 0
More than one year to five years, Held to maturity, Amortized Cost | 0 | 0
More than one year to five years, Held to Maturity, Estimated Fair Value | 0 | 0
More than five years to ten years, Held to maturity Amortized Cost | 2,952 | 1,739
More than five years to ten years, Held to maturity Estimated Fair Value | 2,873 | 1,692
More than ten years, Held to Maturity, Amortized Cost | 1,756 | 2,987
More than ten years, Held to Maturity, Estimated Fair Value | 1,720 | 2,864
Held to maturity (fair value of $5,097 and $5,563 at December 31, 2023 and December 31, 2022) | 4,708 | 4,726
Securities held to maturity, fair value | 4,593 | 4,556
Taxable Municipal Bonds [Member] |  |
Less than one year, Held to Maturity, Amortized Cost | 0 | 501
Less than one year, Held to maturity, Estimated Fair Value | 0 | 498
More than one year to five years, Held to maturity, Amortized Cost | 501 | 502
More than one year to five years, Held to Maturity, Estimated Fair Value | 504 | 509
More than five years to ten years, Held to maturity Amortized Cost | 0 | 0
More than five years to ten years, Held to maturity Estimated Fair Value | 0 | 0
More than ten years, Held to Maturity, Amortized Cost | 0 | 0
More than ten years, Held to Maturity, Estimated Fair Value | 0 | 0
Held to maturity (fair value of $5,097 and $5,563 at December 31, 2023 and December 31, 2022) | 501 | 1,003
Securities held to maturity, fair value | $ 504 | 1,007
Commercial Mortgage-Backed Securities [Member] |  |
Less than one year, Available for sale, Amortized Cost |  | 0
Less than one year, Available for sale, Estimated Fair Value |  | 0
More than one year to five years, Available for sale, Amortized Cost |  | 4,887
Available for sale, Estimated Fair Value, More than one year to five years |  | 4,871
More than five years to ten years, Available for sale, Amortized Cost |  | 0
More than five years to ten years, Available for sale, Estimated Fair Value |  | 0
More than ten years, Available for sale, Amortized Cost |  | 0
More than ten years, Available for sale, Estimated Fair Value |  | 0
Available for sale, amortized cost |  | 4,887
Available for sale |  | $ 4,871

X
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
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