| Condensed Financial Information of Parent Company Only Disclosure [Text Block] |
| 20. | PARENT ONLY CONDENSED FINANCIAL STATEMENTS |
CONDENSED BALANCE SHEETS
December 31, 2025 and 2024
| | | 2025 | | | 2024 | |
| ASSETS | | | | | | | | |
| | | | | | | | | |
| Cash and cash equivalents | | $ | 9,406,000 | | | $ | 12,261,000 | |
| Investment in bank subsidiary | | | 272,899,000 | | | | 180,744,000 | |
| Other assets | | | 297,000 | | | | 369,000 | |
| Total assets | | $ | 282,602,000 | | | $ | 193,374,000 | |
| | | | | | | | | |
| LIABILITIES AND SHAREHOLDERS' EQUITY | | | | | | | | |
| Other liabilities | | $ | 513,000 | | | $ | 474,000 | |
| Borrowings | | | 21,013,000 | | | | 15,000,000 | |
| Total liabilities | | | 21,526,000 | | | | 15,474,000 | |
| | | | | | | | | |
| Shareholders' equity: | | | | | | | | |
| Common stock | | | 75,668,000 | | | | 29,043,000 | |
| Retained earnings | | | 195,899,000 | | | | 174,002,000 | |
| Accumulated other comprehensive loss, net of taxes | | | (10,491,000 | ) | | | (25,145,000 | ) |
| Total shareholders' equity | | | 261,076,000 | | | | 177,900,000 | |
| | | | | | | | | |
| Total liabilities and shareholders' equity | | $ | 282,602,000 | | | $ | 193,374,000 | |
CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME
For the Years Ended December 31, 2025, 2024 and 2023
| | | 2025 | | | 2024 | | | 2023 | |
| Income: | | | | | | | | | | | | |
| Dividends declared by bank subsidiary | | $ | 26,000,000 | | | $ | 10,000,000 | | | $ | 7,500,000 | |
| Gain on termination of swaps | | | - | | | | - | | | | 1,707,000 | |
| Earnings from investment in Plumas Statutory Trust I and II | | | - | | | | - | | | | 5,000 | |
| | | | | | | | | | | | | |
| Total income | | | 26,000,000 | | | | 10,000,000 | | | | 9,212,000 | |
| | | | | | | | | | | | | |
| Expenses: | | | | | | | | | | | | |
| Interest on junior subordinated deferrable interest debentures | | | - | | | | - | | | | 141,000 | |
| Interest on borrowings | | | 1,012,000 | | | | 641,000 | | | | 369,000 | |
| Other expenses | | | 595,000 | | | | 622,000 | | | | 523,000 | |
| | | | | | | | | | | | | |
| Total expenses | | | 1,607,000 | | | | 1,263,000 | | | | 1,033,000 | |
| | | | | | | | | | | | | |
| Income before equity in undistributed income of bank subsidiary | | | 24,393,000 | | | | 8,737,000 | | | | 8,179,000 | |
| | | | | | | | | | | | | |
| Equity in undistributed income of bank subsidiary | | | 4,708,000 | | | | 19,462,000 | | | | 21,746,000 | |
| | | | | | | | | | | | | |
| Income before income taxes | | | 29,101,000 | | | | 28,199,000 | | | | 29,925,000 | |
| Income tax (expense) benefit | | | 516,000 | | | | 420,000 | | | | (149,000 | ) |
| Net income | | $ | 29,617,000 | | | $ | 28,619,000 | | | $ | 29,776,000 | |
| | | | | | | | | | | | | |
| Total comprehensive income | | $ | 44,271,000 | | | $ | 35,938,000 | | | $ | 34,068,000 | |
CONDENSED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2025, 2024 and 2023
| | | 2025 | | | 2024 | | | 2023 | |
| Cash flows from operating activities: | | | | | | | | | | | | |
| Net income | | $ | 29,617,000 | | | $ | 28,619,000 | | | $ | 29,776,000 | |
| Adjustments to reconcile net income to net cash provided by operating activities: | | | | | | | | | | | | |
| Equity in undistributed income of bank subsidiary | | | (4,708,000 | ) | | | (19,462,000 | ) | | | (21,746,000 | ) |
| Stock-based compensation expense | | | 80,000 | | | | 174,000 | | | | 78,000 | |
| Amortization of discount on borrowings | | | 142,000 | | | | - | | | | - | |
| (Increase) decrease in other assets | | | (56,000 | ) | | | 94,000 | | | | 554,000 | |
| (Decrease) increase in other liabilities | | | (51,000 | ) | | | 85,000 | | | | (185,000 | ) |
| Net cash provided by operating activities | | | 25,024,000 | | | | 9,510,000 | | | | 8,477,000 | |
| | | | | | | | | | | | | |
| Cash flows from financing activities: | | | | | | | | | | | | |
| Cash dividends paid on common stock | | | (7,720,000 | ) | | | (6,365,000 | ) | | | (5,862,000 | ) |
| Redemption of Trust Preferred Securities | | | - | | | | - | | | | (10,310,000 | ) |
| Decrease in other borrowings | | | (5,750,000 | ) | | | - | | | | - | |
| Increase in other borrowings | | | - | | | | 5,000,000 | | | | 10,000,000 | |
| Proceeds from exercise of stock options | | | 1,105,000 | | | | 508,000 | | | | 339,000 | |
| Net cash used in financing activities | | | (12,365,000 | ) | | | (857,000 | ) | | | (5,833,000 | ) |
| | | | | | | | | | | | | |
| Cash flows from investing activities: | | | | | | | | | | | | |
| Cash paid in acquisition | | | (15,514,000 | ) | | | - | | | | - | |
| | | | | | | | | | | | | |
| (Decrease) increase in cash and cash equivalents | | | (2,855,000 | ) | | | 8,653,000 | | | | 2,644,000 | |
| | | | | | | | | | | | | |
| Cash and cash equivalents at beginning of year | | | 12,261,000 | | | | 3,608,000 | | | | 964,000 | |
| | | | | | | | | | | | | |
| Cash and cash equivalents at end of year | | $ | 9,406,000 | | | $ | 12,261,000 | | | $ | 3,608,000 | |
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