| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
| (in thousands) |
|
Three months ended September 30, 2026 |
|
| |
|
Unrealized Losses on Available-for-Sale Investments |
|
|
Foreign Currency Translation Adjustments |
|
|
Change in Fair Value of Debt Attributable to Instrument-Specific Credit Risk |
|
|
Total Accumulated Other Comprehensive Income (Loss) |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at June 30, 2026 |
|
$ |
(565 |
) |
|
$ |
(3,286 |
) |
|
$ |
3,905 |
|
|
$ |
54 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Other comprehensive (loss) income arising during the period |
|
|
(707 |
) |
|
|
— |
|
|
|
268 |
|
|
|
(439 |
) |
| Amounts reclassified from accumulated other comprehensive loss |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Net current-period other comprehensive (loss) income |
|
|
(707 |
) |
|
|
— |
|
|
|
268 |
|
|
|
(439 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at September 30, 2026 |
|
$ |
(1,272 |
) |
|
$ |
(3,286 |
) |
|
$ |
4,173 |
|
|
$ |
(385 |
) |
| (in thousands) |
|
Three months ended September 30, 2025 |
|
| |
|
Unrealized Gains (Losses) on Available-for-Sale Investments |
|
|
Foreign Currency Translation Adjustments |
|
|
Change in Fair Value of Debt Attributable to Instrument-Specific Credit Risk |
|
|
Total Accumulated Other Comprehensive Loss |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at June 30, 2025 |
|
$ |
(541 |
) |
|
$ |
(3,286 |
) |
|
$ |
3,187 |
|
|
$ |
(640 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Other comprehensive income arising during the period |
|
|
184 |
|
|
|
— |
|
|
|
58 |
|
|
|
242 |
|
| Amounts reclassified from accumulated other comprehensive loss (a) |
|
|
(9 |
) |
|
|
— |
|
|
|
— |
|
|
|
(9 |
) |
| Net current-period other comprehensive income |
|
|
175 |
|
|
|
— |
|
|
|
58 |
|
|
|
233 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at September 30, 2025 |
|
$ |
(366 |
) |
|
$ |
(3,286 |
) |
|
$ |
3,245 |
|
|
$ |
(407 |
) |
| (in thousands) |
|
Nine months ended September 30, 2026 |
|
| |
|
Unrealized Losses on Available-for-Sale Investments |
|
|
Foreign Currency Translation Adjustments |
|
|
Change in Fair Value of Debt Attributable to Instrument-Specific Credit Risk |
|
|
Total Accumulated Other Comprehensive Loss |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at January 1, 2026 |
|
$ |
(241 |
) |
|
$ |
(3,286 |
) |
|
$ |
3,467 |
|
|
$ |
(60 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Other comprehensive (loss) income arising during the period |
|
|
(1,031 |
) |
|
|
— |
|
|
|
706 |
|
|
|
(325 |
) |
| Amounts reclassified from accumulated other comprehensive loss |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Net current-period other comprehensive (loss) income |
|
|
(1,031 |
) |
|
|
— |
|
|
|
706 |
|
|
|
(325 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at September 30, 2026 |
|
$ |
(1,272 |
) |
|
$ |
(3,286 |
) |
|
$ |
4,173 |
|
|
$ |
(385 |
) |
| (in thousands) |
|
Nine months ended September 30, 2025 |
|
| |
|
Unrealized Gains (Losses) on Available-for-Sale Investments |
|
|
Foreign Currency Translation Adjustments |
|
|
Change in Fair Value of Debt Attributable to Instrument-Specific Credit Risk |
|
|
Total Accumulated Other Comprehensive Loss |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at January 1, 2025 |
|
$ |
(1,157 |
) |
|
$ |
(3,286 |
) |
|
$ |
3,725 |
|
|
$ |
(718 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Other comprehensive income (loss) arising during the period |
|
|
801 |
|
|
|
— |
|
|
|
(480 |
) |
|
|
321 |
|
| Amounts reclassified from accumulated other comprehensive loss (a) |
|
|
(10 |
) |
|
|
— |
|
|
|
— |
|
|
|
(10 |
) |
| Net current-period other comprehensive income (loss) |
|
|
791 |
|
|
|
— |
|
|
|
(480 |
) |
|
|
311 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at September 30, 2025 |
|
$ |
(366 |
) |
|
$ |
(3,286 |
) |
|
$ |
3,245 |
|
|
$ |
(407 |
) |
|