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Note 3 - Debt Securities (Tables) | 6 Months Ended
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Jun. 30, 2024
Notes Tables |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  | June 30, 2024 |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 10,784 |  |  | $ | - |  |  | $ | (13 | ) |  | $ | 10,771 |
Municipal securities |  |  | 15,951 |  |  |  | 2 |  |  |  | (263 | ) |  |  | 15,690 |
Corporate notes |  |  | 28,583 |  |  |  | - |  |  |  | (1,601 | ) |  |  | 26,982 |
Agency mortgage-backed securities |  |  | 90,304 |  |  |  | - |  |  |  | (14,061 | ) |  |  | 76,243 |
Total |  | $ | 145,622 |  |  | $ | 2 |  |  | $ | (15,938 | ) |  | $ | 129,686 |
|  | December 31, 2023 |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Agency securities |  | $ | 5,750 |  |  | $ | - |  |  | $ | (1 | ) |  | $ | 5,749 |
U.S. Treasury securities |  |  | 146,653 |  |  |  | 16 |  |  |  | (843 | ) |  |  | 145,826 |
Municipal securities |  |  | 19,528 |  |  |  | 11 |  |  |  | (162 | ) |  |  | 19,377 |
Corporate notes |  |  | 28,566 |  |  |  | - |  |  |  | (1,485 | ) |  |  | 27,081 |
Agency mortgage-backed securities |  |  | 94,548 |  |  |  | 2 |  |  |  | (11,622 | ) |  |  | 82,928 |
Total |  | $ | 295,045 |  |  | $ | 29 |  |  | $ | (14,113 | ) |  | $ | 280,961 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | June 30, 2024 |
|  | Amortized |  |  |  |  |
(Amounts in thousands) |  | Cost |  |  | Fair Value |
Available-for-sale debt securities |  |  |  |  |  |  |  |
Due within one year |  | $ | 15,364 |  |  | $ | 15,321 |
Due after one year but within five years |  |  | 39,954 |  |  |  | 38,122 |
Due after five years but within ten years |  |  | - |  |  |  | - |
|  |  | 55,318 |  |  |  | 53,443 |
Agency mortgage-backed securities |  |  | 90,304 |  |  |  | 76,243 |
Total debt securities available-for-sale |  | $ | 145,622 |  |  | $ | 129,686 |
Gain (Loss) on Securities [Table Text Block] |
|  | June 30, 2024 |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 10,771 |  |  | $ | (13 | ) |  | $ | - |  |  | $ | - |  |  | $ | 10,771 |  |  | $ | (13 | )
Municipal securities |  |  | 6,204 |  |  |  | (39 | ) |  |  | 7,401 |  |  |  | (224 | ) |  |  | 13,605 |  |  |  | (263 | )
Corporate notes |  |  | - |  |  |  | - |  |  |  | 26,982 |  |  |  | (1,601 | ) |  |  | 26,982 |  |  |  | (1,601 | )
Agency mortgage-backed securities |  |  | 4,332 |  |  |  | (83 | ) |  |  | 71,910 |  |  |  | (13,978 | ) |  |  | 76,242 |  |  |  | (14,061 | )
Total |  | $ | 21,307 |  |  | $ | (135 | ) |  | $ | 106,293 |  |  | $ | (15,803 | ) |  | $ | 127,600 |  |  | $ | (15,938 | )
|  | December 31, 2023 |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Agency securities |  | $ | 5,749 |  |  | $ | (1 | ) |  | $ | — |  |  | $ | — |  |  | $ | 5,749 |  |  | $ | (1 | )
U.S. Treasury securities |  |  | 11,417 |  |  |  | (14 | ) |  |  | 129,108 |  |  |  | (829 | ) |  |  | 140,525 |  |  |  | (843 | )
Municipal securities |  |  | 4,742 |  |  |  | (20 | ) |  |  | 5,484 |  |  |  | (142 | ) |  |  | 10,226 |  |  |  | (162 | )
Corporate notes |  |  | — |  |  |  | — |  |  |  | 27,081 |  |  |  | (1,485 | ) |  |  | 27,081 |  |  |  | (1,485 | )
Agency mortgage-backed securities |  |  | 3,421 |  |  |  | (10 | ) |  |  | 78,319 |  |  |  | (11,612 | ) |  |  | 81,740 |  |  |  | (11,622 | )
Total |  | $ | 25,329 |  |  | $ | (45 | ) |  | $ | 239,992 |  |  | $ | (14,068 | ) |  | $ | 265,321 |  |  | $ | (14,113 | )
Realized Gain (Loss) on Investments [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross realized gains |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | 7 |
Gross realized losses |  |  | - |  |  |  | (28 | ) |  |  | - |  |  |  | (28 | )
Net gain (loss) on sale of securities |  | $ | - |  |  | $ | (28 | ) |  | $ | - |  |  | $ | (21 | )

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