| Debt Securities, Available-for-Sale [Table Text Block] |
| September 30, 2025 |
|
U.S. Treasury notes |
|
|
U.S. government agency obligations |
|
|
Municipal obligations |
|
|
Mortgage-backed residential obligations |
|
|
Collateralized mortgage obligations |
|
|
Total available-for-sale |
|
| |
|
(Dollars in thousands) |
|
| 1 year or less |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
79 |
|
|
$ |
— |
|
|
$ |
717 |
|
|
$ |
796 |
|
| 1 to 5 years |
|
|
7,077 |
|
|
|
6,366 |
|
|
|
1,322 |
|
|
|
8,235 |
|
|
|
17,849 |
|
|
|
40,849 |
|
| 5 to 10 years |
|
|
— |
|
|
|
2,150 |
|
|
|
3,206 |
|
|
|
15,716 |
|
|
|
6,841 |
|
|
|
27,913 |
|
| After 10 years |
|
|
— |
|
|
|
— |
|
|
|
7,323 |
|
|
|
578 |
|
|
|
2,102 |
|
|
|
10,003 |
|
| Fair value |
|
|
7,077 |
|
|
|
8,516 |
|
|
|
11,930 |
|
|
|
24,529 |
|
|
|
27,509 |
|
|
|
79,561 |
|
| Gross unrealized gains |
|
|
1 |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
1 |
|
| Gross unrealized losses |
|
|
(3 |
) |
|
|
(748 |
) |
|
|
(2,056 |
) |
|
|
(3,185 |
) |
|
|
(2,714 |
) |
|
|
(8,706 |
) |
| Amortized cost |
|
$ |
7,079 |
|
|
$ |
9,264 |
|
|
$ |
13,986 |
|
|
$ |
27,714 |
|
|
$ |
30,223 |
|
|
$ |
88,266 |
|
| December 31, 2024 |
|
U.S. government agency obligations |
|
|
Municipal obligations |
|
|
Mortgage-backed residential obligations |
|
|
Collateralized mortgage obligations |
|
|
Total available-for-sale |
|
| |
|
(Dollars in thousands) |
|
| 1 year or less |
|
$ |
1,000 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
1,000 |
|
| 1 to 5 years |
|
|
3,047 |
|
|
|
1,452 |
|
|
|
8,971 |
|
|
|
15,086 |
|
|
|
28,556 |
|
| 5 to 10 years |
|
|
4,610 |
|
|
|
2,401 |
|
|
|
15,794 |
|
|
|
7,786 |
|
|
|
30,591 |
|
| After 10 years |
|
|
— |
|
|
|
7,883 |
|
|
|
1,150 |
|
|
|
2,069 |
|
|
|
11,102 |
|
| Fair value |
|
|
8,657 |
|
|
|
11,736 |
|
|
|
25,915 |
|
|
|
24,941 |
|
|
|
71,249 |
|
| Gross unrealized gains |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Gross unrealized losses |
|
|
(1,062 |
) |
|
|
(2,367 |
) |
|
|
(4,766 |
) |
|
|
(3,842 |
) |
|
|
(12,037 |
) |
| Amortized cost |
|
$ |
9,719 |
|
|
$ |
14,103 |
|
|
$ |
30,681 |
|
|
$ |
28,783 |
|
|
$ |
83,286 |
|
|
| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] |
| |
|
Less than 12 Months |
|
|
12 Months or Longer |
|
|
Total |
|
| |
|
(Dollars in thousands) |
|
| |
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
|
Fair |
|
|
Unrealized |
|
| |
|
Value |
|
|
Losses |
|
|
Value |
|
|
Losses |
|
|
Value |
|
|
Losses |
|
| September 30, 2025 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury notes |
|
$ |
4,501 |
|
|
$ |
3 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
4,501 |
|
|
$ |
3 |
|
| U.S. government agency obligations |
|
|
— |
|
|
|
— |
|
|
|
7,516 |
|
|
|
748 |
|
|
|
7,516 |
|
|
|
748 |
|
| Municipal obligations |
|
|
— |
|
|
|
— |
|
|
|
11,930 |
|
|
|
2,056 |
|
|
|
11,930 |
|
|
|
2,056 |
|
| Mortgage-backed residential obligations |
|
|
— |
|
|
|
— |
|
|
|
24,529 |
|
|
|
3,185 |
|
|
|
24,529 |
|
|
|
3,185 |
|
| Collateralized mortgage obligations |
|
|
2,613 |
|
|
|
22 |
|
|
|
24,896 |
|
|
|
2,692 |
|
|
|
27,509 |
|
|
|
2,714 |
|
| Total |
|
$ |
7,114 |
|
|
$ |
25 |
|
|
$ |
68,871 |
|
|
$ |
8,681 |
|
|
$ |
75,985 |
|
|
$ |
8,706 |
|
| December 31, 2024 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. government agency obligations |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
8,657 |
|
|
$ |
1,062 |
|
|
$ |
8,657 |
|
|
$ |
1,062 |
|
| Municipal obligations |
|
|
467 |
|
|
|
28 |
|
|
|
11,269 |
|
|
|
2,339 |
|
|
|
11,736 |
|
|
|
2,367 |
|
| Mortgage-backed residential obligations |
|
|
— |
|
|
|
— |
|
|
|
25,915 |
|
|
|
4,766 |
|
|
|
25,915 |
|
|
|
4,766 |
|
| Collateralized mortgage obligations |
|
|
— |
|
|
|
— |
|
|
|
24,941 |
|
|
|
3,842 |
|
|
|
24,941 |
|
|
|
3,842 |
|
| Total |
|
$ |
467 |
|
|
$ |
28 |
|
|
$ |
70,782 |
|
|
$ |
12,009 |
|
|
$ |
71,249 |
|
|
$ |
12,037 |
|
|