| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
| | | September 30, 2026 | |
| | | Level 1 | | | Level 2 | | | Level 3 | | | Total Fair | |
| | | Inputs | | | Inputs | | | Inputs | | | Value | |
| | | (In Thousands) | |
| Financial assets: | | | | | | | | | | | | | | | | |
| Available-for-sale securities: | | | | | | | | | | | | | | | | |
| U.S. government and agency obligations | | $ | - | | | $ | 3,662 | | | $ | - | | | $ | 3,662 | |
| U.S. treasury obligations | | | 43,472 | | | | - | | | | - | | | | 43,472 | |
| Municipal obligations | | | - | | | | 117,639 | | | | - | | | | 117,639 | |
| Corporate obligations | | | - | | | | 983 | | | | - | | | | 983 | |
| Mortgage-backed securities | | | - | | | | 23,939 | | | | - | | | | 23,939 | |
| Collateralized mortgage obligations | | | - | | | | 76,990 | | | | - | | | | 76,990 | |
| Asset-backed securities | | | - | | | | 6,139 | | | | - | | | | 6,139 | |
| Loans held-for-sale | | | - | | | | 12,812 | | | | - | | | | 12,812 | |
| Forward TBA mortgage-backed securities | | | - | | | | 461 | | | | - | | | | 461 | |
| Financial liabilities: | | | | | | | | | | | | | | | | |
| Interest rate lock commitments | | | - | | | | - | | | | 88 | | | | 88 | |
| | | December 31, 2025 | |
| | | Level 1 | | | Level 2 | | | Level 3 | | | Total Fair | |
| | | Inputs | | | Inputs | | | Inputs | | | Value | |
| | | (In Thousands) | |
| Financial assets: | | | | | | | | | | | | | | | | |
| Available-for-sale securities: | | | | | | | | | | | | | | | | |
| U.S. government and agency obligations | | $ | - | | | $ | 4,155 | | | $ | - | | | $ | 4,155 | |
| U.S. treasury obligations | | | 44,308 | | | | - | | | | - | | | | 44,308 | |
| Municipal obligations | | | - | | | | 118,324 | | | | - | | | | 118,324 | |
| Corporate obligations | | | - | | | | 1,971 | | | | - | | | | 1,971 | |
| Mortgage-backed securities | | | - | | | | 26,494 | | | | - | | | | 26,494 | |
| Collateralized mortgage obligations | | | - | | | | 79,661 | | | | - | | | | 79,661 | |
| Asset-backed securities | | | - | | | | 6,779 | | | | - | | | | 6,779 | |
| Loans held-for-sale | | | - | | | | 7,452 | | | | - | | | | 7,452 | |
| Financial liabilities: | | | | | | | | | | | | | | | | |
| Forward TBA mortgage-backed securities | | | - | | | | 55 | | | | - | | | | 55 | |
| Interest rate lock commitments | | | - | | | | - | | | | 49 | | | | 49 | |
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| Fair Value, by Balance Sheet Grouping [Table Text Block] |
| | | September 30, 2026 | |
| | | Level 1 | | | Level 2 | | | Level 3 | | | Total | | | Carrying | |
| | | Inputs | | | Inputs | | | Inputs | | | Fair Value | | | Amount | |
| | | (In Thousands) | |
| Financial assets: | | | | | | | | | | | | | | | | | | | | |
| Cash and cash equivalents | | $ | 24,859 | | | $ | - | | | $ | - | | | $ | 24,859 | | | $ | 24,859 | |
| FHLB stock | | | - | | | | 12,097 | | | | - | | | | 12,097 | | | | 12,097 | |
| FRB stock | | | - | | | | 4,131 | | | | - | | | | 4,131 | | | | 4,131 | |
| Loans receivable, gross | | | - | | | | - | | | | 1,701,406 | | | | 1,701,406 | | | | 1,717,378 | |
| Mortgage servicing rights | | | - | | | | - | | | | 20,100 | | | | 20,100 | | | | 14,832 | |
| Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
| Time certificates of deposit | | | - | | | | - | | | | 462,932 | | | | 462,932 | | | | 465,680 | |
| FHLB advances and other borrowings | | | - | | | | - | | | | 196,387 | | | | 196,387 | | | | 196,759 | |
| Other long-term debt | | | - | | | | - | | | | 44,645 | | | | 44,645 | | | | 45,155 | |
| | | December 31, 2025 | |
| | | Level 1 | | | Level 2 | | | Level 3 | | | Total | | | Carrying | |
| | | Inputs | | | Inputs | | | Inputs | | | Fair Value | | | Amount | |
| | | (In Thousands) | |
| Financial assets: | | | | | | | | | | | | | | | | | | | | |
| Cash and cash equivalents | | $ | 62,962 | | | $ | - | | | $ | - | | | $ | 62,962 | | | $ | 62,962 | |
| FHLB stock | | | - | | | | 2,650 | | | | - | | | | 2,650 | | | | 2,650 | |
| FRB stock | | | - | | | | 4,131 | | | | - | | | | 4,131 | | | | 4,131 | |
| Loans receivable, gross | | | - | | | | - | | | | 1,493,348 | | | | 1,493,348 | | | | 1,519,019 | |
| Mortgage servicing rights | | | - | | | | - | | | | 20,302 | | | | 20,302 | | | | 15,043 | |
| Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
| Time certificates of deposit | | | - | | | | - | | | | 461,201 | | | | 461,201 | | | | 462,172 | |
| Federal Funds Purchased | | | - | | | | - | | | | 105 | | | | 105 | | | | 105 | |
| FHLB advances and other borrowings | | | - | | | | - | | | | 38,447 | | | | 38,447 | | | | 37,917 | |
| Other long-term debt | | | - | | | | - | | | | 43,905 | | | | 43,905 | | | | 45,155 | |
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