Note 3 - Investments in Securities (Tables)
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3 Months Ended |
Mar. 31, 2026 |
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| Notes Tables |
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| Debt Securities, Available-for-Sale [Table Text Block] |
| | | | | | | Gross | | | Gross | | | Allowance | | | | | |
| | | Amortized | | | Unrealized | | | Unrealized | | | for Credit | | | Fair | |
| Available-for-sale | | Cost | | | Gains | | | Losses | | | Losses | | | Value | |
| | | (in thousands) | |
| March 31, 2026 | | | | | | | | | | | | | | | | | | | | |
| Mortgage-backed securities | | $ | 6,316 | | | $ | 25 | | | $ | (4 | ) | | $ | — | | | $ | 6,337 | |
| Collateralized mortgage obligations | | | 12,271 | | | | 12 | | | | (48 | ) | | | — | | | | 12,235 | |
| Corporate bonds | | | 18,233 | | | | 294 | | | | (33 | ) | | | — | | | | 18,494 | |
| Total available-for-sale securities | | $ | 36,820 | | | $ | 331 | | | $ | (85 | ) | | $ | — | | | $ | 37,066 | |
| | | | | | | | | | | | | | | | | | | | | |
| December 31, 2025 | | | | | | | | | | | | | | | | | | | | |
| Mortgage-backed securities | | $ | 6,411 | | | $ | 51 | | | $ | (3 | ) | | $ | — | | | $ | 6,459 | |
| Collateralized mortgage obligations | | | 10,937 | | | | 48 | | | | (37 | ) | | | — | | | | 10,948 | |
| Corporate bonds | | | 16,732 | | | | 225 | | | | (47 | ) | | | — | | | | 16,910 | |
| Total available-for-sale securities | | $ | 34,080 | | | $ | 324 | | | $ | (87 | ) | | $ | — | | | $ | 34,317 | |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
| | | | | | | Less than 12 Months | | | 12 Months or Longer | | | Total | |
| | | # of | | | Fair | | | Unrealized | | | Fair | | | Unrealized | | | Fair | | | Unrealized | |
| | | Holdings | | | Value | | | Losses | | | Value | | | Losses | | | Value | | | Losses | |
| | | | | | | | | | | | | | | (Dollars in thousands) | | | | | | | | | |
| March 31, 2026 | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Available-for-Sale: | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Mortgage-backed securities | | | 1 | | | $ | — | | | $ | — | | | $ | 1,356 | | | $ | (4 | ) | | $ | 1,356 | | | $ | (4 | ) |
| Collateralized mortgage obligations | | | 6 | | | | 8,174 | | | | (30 | ) | | | 1,407 | | | | (18 | ) | | | 9,581 | | | | (48 | ) |
| Corporate bonds | | | 1 | | | | 2,646 | | | | (33 | ) | | | — | | | | — | | | | 2,646 | | | | (33 | ) |
| Total | | | 8 | | | $ | 10,820 | | | $ | (63 | ) | | $ | 2,763 | | | $ | (22 | ) | | $ | 13,583 | | | $ | (85 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| December 31, 2025 | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Available-for-Sale: | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Mortgage-backed securities | | | 1 | | | $ | — | | | $ | — | | | $ | 1,362 | | | $ | (3 | ) | | $ | 1,362 | | | $ | (3 | ) |
| Collateralized mortgage obligations | | | 3 | | | | 3,778 | | | | (15 | ) | | | 1,405 | | | | (22 | ) | | | 5,183 | | | | (37 | ) |
| Corporate bonds | | | 4 | | | | 7,666 | | | | (47 | ) | | | — | | | | — | | | | 7,666 | | | | (47 | ) |
| Total | | | 8 | | | $ | 11,444 | | | $ | (62 | ) | | $ | 2,767 | | | $ | (25 | ) | | $ | 14,211 | | | $ | (87 | ) |
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| Debt Securities, Held-to-Maturity [Table Text Block] |
| | | | | | | Gross | | | Gross | | | Allowance | | | | | |
| | | Amortized | | | Unrealized | | | Unrealized | | | for Credit | | | Fair | |
| Held-to-maturity: | | Cost | | | Gains | | | Losses | | | Losses | | | Value | |
| | | (in thousands) | |
| March 31, 2026 | | | | | | | | | | | | | | | | | | | | |
| Mortgage-backed securities | | $ | 35,492 | | | $ | 37 | | | $ | (3,465 | ) | | $ | — | | | $ | 32,064 | |
| Corporate bonds | | | 16,132 | | | | 200 | | | | (352 | ) | | | — | | | | 15,980 | |
| Total held-to-maturity securities | | $ | 51,624 | | | $ | 237 | | | $ | (3,817 | ) | | $ | — | | | $ | 48,044 | |
| | | | | | | | | | | | | | | | | | | | | |
| December 31, 2025 | | | | | | | | | | | | | | | | | | | | |
| Mortgage-backed securities | | | 36,645 | | | | 88 | | | | (3,453 | ) | | | — | | | | 33,280 | |
| Corporate bonds | | | 19,119 | | | | 262 | | | | (335 | ) | | | — | | | | 19,046 | |
| Total held-to-maturity securities | | $ | 55,764 | | | $ | 350 | | | $ | (3,788 | ) | | $ | — | | | $ | 52,326 | |
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| Investments Classified by Contractual Maturity Date [Table Text Block] |
| | | Available-for-sale | | | Held-to-maturity | |
| | | Fair | | | Amortized | | | Fair | |
| | | Value | | | Cost | | | Value | |
| | | (in thousands) | |
| Within 1 year | | $ | 6,955 | | | $ | 6,038 | | | $ | 6,034 | |
| After 1 year through 5 years | | | 4,189 | | | | 8,017 | | | | 8,052 | |
| After 5 years through 10 years | | | 12,895 | | | | 11,715 | | | | 10,960 | |
| After 10 years | | | 13,027 | | | | 25,854 | | | | 22,998 | |
| Total | | $ | 37,066 | | | $ | 51,624 | | | $ | 48,044 | |
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