| Debt Securities, Available-for-Sale [Table Text Block] |
| March 31, 2024 |
|
|
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 |
|
$ |
2,992 |
|
|
$ |
992 |
|
|
$ |
1,297 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
5,281 |
|
| 1 to 5 years |
|
|
— |
|
|
|
3,629 |
|
|
|
1,447 |
|
|
|
9,053 |
|
|
|
12,151 |
|
|
|
26,280 |
|
| 5 to 10 years |
|
|
— |
|
|
|
4,182 |
|
|
|
1,266 |
|
|
|
18,492 |
|
|
|
9,629 |
|
|
|
33,569 |
|
| After 10 years |
|
|
— |
|
|
|
— |
|
|
|
9,377 |
|
|
|
1,421 |
|
|
|
3,871 |
|
|
|
14,669 |
|
| Fair value |
|
|
2,992 |
|
|
|
8,803 |
|
|
|
13,387 |
|
|
|
28,966 |
|
|
|
25,651 |
|
|
|
79,799 |
|
| Gross unrealized gains |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Gross unrealized losses |
|
|
(8 |
) |
|
|
(1,193 |
) |
|
|
(2,051 |
) |
|
|
(4,876 |
) |
|
|
(4,144 |
) |
|
|
(12,272 |
) |
| Amortized cost |
|
$ |
3,000 |
|
|
$ |
9,996 |
|
|
$ |
15,438 |
|
|
$ |
33,842 |
|
|
$ |
29,795 |
|
|
$ |
92,071 |
|
| December 31, 2023 |
|
|
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 |
|
$ |
2,973 |
|
|
$ |
— |
|
|
$ |
1,292 |
|
|
$ |
— |
|
|
$ |
— |
|
|
$ |
4,265 |
|
| 1 to 5 years |
|
|
— |
|
|
|
4,769 |
|
|
|
1,461 |
|
|
|
8,976 |
|
|
|
12,919 |
|
|
|
28,125 |
|
| 5 to 10 years |
|
|
— |
|
|
|
4,337 |
|
|
|
882 |
|
|
|
19,777 |
|
|
|
9,756 |
|
|
|
34,752 |
|
| After 10 years |
|
|
— |
|
|
|
— |
|
|
|
9,935 |
|
|
|
1,598 |
|
|
|
3,460 |
|
|
|
14,993 |
|
| Fair value |
|
|
2,973 |
|
|
|
9,106 |
|
|
|
13,570 |
|
|
|
30,351 |
|
|
|
26,135 |
|
|
|
82,135 |
|
| Gross unrealized gains |
|
|
— |
|
|
|
— |
|
|
|
1 |
|
|
|
— |
|
|
|
— |
|
|
|
1 |
|
| Gross unrealized losses |
|
|
(22 |
) |
|
|
(1,128 |
) |
|
|
(1,882 |
) |
|
|
(4,533 |
) |
|
|
(3,938 |
) |
|
|
(11,503 |
) |
| Amortized cost |
|
$ |
2,995 |
|
|
$ |
10,234 |
|
|
$ |
15,451 |
|
|
$ |
34,884 |
|
|
$ |
30,073 |
|
|
$ |
93,637 |
|
|
| 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 |
|
| March 31, 2024 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury Notes |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
1,492 |
|
|
$ |
8 |
|
|
$ |
1,492 |
|
|
$ |
8 |
|
| U.S. government agency obligations |
|
|
— |
|
|
|
— |
|
|
|
8,803 |
|
|
|
1,193 |
|
|
|
8,803 |
|
|
|
1,193 |
|
| Municipal obligations |
|
|
565 |
|
|
|
9 |
|
|
|
12,352 |
|
|
|
2,042 |
|
|
|
12,917 |
|
|
|
2,051 |
|
| Mortgage-backed residential obligations |
|
|
— |
|
|
|
— |
|
|
|
28,966 |
|
|
|
4,876 |
|
|
|
28,966 |
|
|
|
4,876 |
|
| Collateralized mortgage obligations |
|
|
— |
|
|
|
— |
|
|
|
25,651 |
|
|
|
4,144 |
|
|
|
25,651 |
|
|
|
4,144 |
|
| Total |
|
$ |
565 |
|
|
$ |
9 |
|
|
$ |
77,264 |
|
|
$ |
12,263 |
|
|
$ |
77,829 |
|
|
$ |
12,272 |
|
| December 31, 2023 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| U.S. Treasury Notes |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
2,973 |
|
|
$ |
22 |
|
|
$ |
2,973 |
|
|
$ |
22 |
|
| U.S. government agency obligations |
|
|
— |
|
|
|
— |
|
|
|
9,106 |
|
|
|
1,128 |
|
|
|
9,106 |
|
|
|
1,128 |
|
| Municipal obligations |
|
|
279 |
|
|
|
1 |
|
|
|
12,796 |
|
|
|
1,881 |
|
|
|
13,075 |
|
|
|
1,882 |
|
| Mortgage-backed residential obligations |
|
|
— |
|
|
|
— |
|
|
|
30,351 |
|
|
|
4,533 |
|
|
|
30,351 |
|
|
|
4,533 |
|
| Collateralized mortgage obligations |
|
|
— |
|
|
|
— |
|
|
|
26,135 |
|
|
|
3,938 |
|
|
|
26,135 |
|
|
|
3,938 |
|
| Total |
|
$ |
279 |
|
|
$ |
1 |
|
|
$ |
81,361 |
|
|
$ |
11,502 |
|
|
$ |
81,640 |
|
|
$ |
11,503 |
|
|