Note 15 - Income Taxes (Tables)
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12 Months Ended |
Dec. 31, 2025 |
| Notes Tables |
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| Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
| 2025 | | Federal | | | State | | | Total | |
| Current | | $ | 4,558,000 | | | $ | 3,148,000 | | | $ | 7,706,000 | |
| Deferred | | | 1,713,000 | | | | 556,000 | | | | 2,269,000 | |
| Provision for income taxes | | $ | 6,271,000 | | | $ | 3,704,000 | | | $ | 9,975,000 | |
| 2024 | | Federal | | | State | | | Total | |
| Current | | $ | 6,896,000 | | | $ | 3,540,000 | | | $ | 10,436,000 | |
| Deferred | | | 75,000 | | | | (129,000 | ) | | | (54,000 | ) |
| Provision for income taxes | | $ | 6,971,000 | | | $ | 3,411,000 | | | $ | 10,382,000 | |
| 2023 | | Federal | | | State | | | Total | |
| Current | | $ | 7,310,000 | | | $ | 3,827,000 | | | $ | 11,137,000 | |
| Deferred | | | (582,000 | ) | | | (120,000 | ) | | | (702,000 | ) |
| Provision for income taxes | | $ | 6,728,000 | | | $ | 3,707,000 | | | $ | 10,435,000 | |
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| Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
| | | December 31, | |
| | | 2025 | | | 2024 | |
| Deferred tax assets: | | | | | | | | |
| | | | | | | | | |
| Allowance for credit losses | | $ | 9,989,000 | | | $ | 3,714,000 | |
| Deferred compensation | | | 2,315,000 | | | | 1,166,000 | |
| State taxes | | | 618,000 | | | | 734,000 | |
| Premises and equipment | | | 554,000 | | | | 190,000 | |
| Unrealized loss on available-for-sale investment securities | | | 4,315,000 | | | | 10,552,000 | |
| Lease liability | | | 8,410,000 | | | | 6,968,000 | |
| Acquired Net operating loss | | | 750,000 | | | | - | |
| Other | | | 995,000 | | | | 1,144,000 | |
| Total deferred tax assets | | | 27,946,000 | | | | 24,468,000 | |
| | | | | | | | | |
| Deferred tax liabilities: | | | | | | | | |
| | | | | | | | | |
| Deferred loan costs | | | (1,627,000 | ) | | | (1,397,000 | ) |
| Purchase accounting adjustments | | | (3,105,000 | ) | | | (249,000 | ) |
| Right-of-use assets | | | (8,361,000 | ) | | | (6,849,000 | ) |
| Other | | | (360,000 | ) | | | (241,000 | ) |
| Total deferred tax liabilities | | | (13,453,000 | ) | | | (8,736,000 | ) |
| Net deferred tax assets | | $ | 14,493,000 | | | $ | 15,732,000 | |
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| Activity in Affordable Housing Program Obligation [Table Text Block] |
| | | December 31, 2025 | | December 31, 2024 | | | December 31, 2023 | |
| Tax credits and other tax benefits - decrease in tax expense | $ | 382,359 | | $ | 305,928 | | $ | 142,691 | |
| Amortization - increase in tax expense | $ | 334,198 | | $ | 237,753 | | $ | 93,012 | |
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| Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
| | | Year Ending December 31 | |
| | | 2025 | | | 2024 | | | 2023 | |
| | | Amount | | | Percent | | | Amount | | | Percent | | | Amount | | | Percent | |
| US Federal Statutory Tax Rate | | $ | 8,314,422 | | | | 21.00 | % | | $ | 8,190,210 | | | | 21.00 | % | | $ | 8,444,310 | | | | 21.00 | % |
| State and Local Income Taxes, Net of Federal Income Tax Effect | | | 2,971,573 | | | | 7.51 | % | | | 2,730,070 | | | | 7.00 | % | | | 2,814,770 | | | | 7.00 | % |
| Enactment of new tax laws | | | (6,629 | ) | | | (0.02 | %) | | | - | | | | 0.00 | % | | | - | | | | 0.00 | % |
| Tax Credits | | | | | | | | | | | | | | | | | | | | | | | | |
| Affordable housing tax credit and benefits | | | (382,359 | ) | | | (0.97 | %) | | | (305,928 | ) | | | (0.80 | %) | | | (142,691 | ) | | | (0.40 | %) |
| Affordable housing amortization | | | 334,198 | | | | 0.84 | % | | | 237,753 | | | | 0.60 | % | | | 93,012 | | | | 0.20 | % |
| Acquired Solar ITCs (Investment Tax Credits) | | | (700,000 | ) | | | (1.77 | %) | | | - | | | | 0.00 | % | | | - | | | | 0.00 | % |
| Other | | | | | | | | | | | | | | | | | | | | | | | | |
| Interest on obligations of states and political subdivisions | | | (430,841 | ) | | | (1.09 | %) | | | (468,012 | ) | | | (1.22 | %) | | | (723,798 | ) | | | (1.75 | %) |
| Net increase in cash surrender value of bank owned life insurance | | | (155,223 | ) | | | (0.39 | %) | | | (78,002 | ) | | | (0.20 | %) | | | (80,422 | ) | | | (0.20 | %) |
| Other, net | | | 29,859 | | | | 0.08 | % | | | 75,909 | | | | 0.22 | % | | | 29,819 | | | | 0.15 | % |
| Total | | $ | 9,975,000 | | | | 25.19 | % | | $ | 10,382,000 | | | | 26.60 | % | | $ | 10,435,000 | | | | 26.00 | % |
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| Schedule of Income Taxes Paid [Table Text Block] |
| | | Year Ending December 31 | |
| | | 2025 | | | 2024 | | | 2023 | |
| Federal | | $ | 5,750,000 | | | $ | 6,260,000 | | | $ | 8,100,000 | |
| State and Local | | | | | | | | | | | | |
| California | | | 2,805,000 | | | | 3,360,000 | | | | 4,130,000 | |
| Other | | | 40,000 | | | | 35,000 | | | | 31,000 | |
| Subtotal State and Local | | | 2,845,000 | | | | 3,395,000 | | | | 4,161,000 | |
| Total | | $ | 8,595,000 | | | $ | 9,655,000 | | | $ | 12,261,000 | |
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