| Schedule of Debt [Table Text Block] |
| Contractual Maturity Date | | Stated Interest Rate | | | Conversion Price per Share | | | Face Value Principal Outstanding | | | Fair Value | |
2026 Note | February 3, 2029 | | | 15.000 | % | | $ | 450.00 | | | | 15,000 | | | | 15,100 | |
Balance as of June 30, 2026 | | | | | | | | | | | $ | 15,000 | | | $ | 15,100 | |
| Contractual Maturity Date | | Stated Interest Rate | | | Conversion Price per Share | | | Face Value Principal Outstanding | | | Fair Value | |
September 2022 Senior Convertible Note | December 31, 2026 | | | 7.875 | % | | $ | 32.04 | | | | 7,839 | | | | 11,100 | |
Balance as of December 31, 2025 | | | | | | | | | | | $ | 7,839 | | | $ | 11,100 | |
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| Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] |
| | September 2022 Senior Convertible Note | | | 2026 Note | | | Sum of Balance Sheet Fair Value Components | | | Other Income (expense) | |
Fair Value - March 31, 2026 | | $ | — | | | $ | 14,900 | | | $ | 14,900 | | | $ | — | |
Face value principal – issue date | | | — | | | | — | | | | — | | | | — | |
Non-installment payments – cash interest paid | | | — | | | | (365 | ) | | | (365 | ) | | | — | |
Change in fair value | | | — | | | | 565 | | | | 565 | | | | (565 | ) |
Fair Value at June 30, 2026 | | $ | — | | | $ | 15,100 | | | $ | 15,100 | | | | | |
Other Income (Expense) - Change in fair value – three month period ended June 30, 2026 | | | | | | | | | | | | | | $ | (565 | ) |
| | September 2022 Senior Convertible Note | | | 2026 Note | | | Sum of Balance Sheet Fair Value Components | | | Other Income (expense) | |
Fair Value - December 31, 2025 | | $ | 11,100 | | | $ | — | | | $ | 11,100 | | | $ | — | |
Face value principal – issue date | | | — | | | | 15,000 | | | | 15,000 | | | | — | |
Non-installment payments – cash interest paid | | | — | | | | (365 | ) | | | (365 | ) | | | — | |
Principal repayments – cash | | | (7,840 | ) | | | — | | | | (7,840 | ) | | | — | |
Change in fair value | | | (3,260 | ) | | | 465 | | | | (2,795 | ) | | | 2,795 | |
Fair Value at June 30, 2026 | | $ | — | | | $ | 15,100 | | | $ | 15,100 | | | | | |
Other Income (Expense) - Change in fair value – six months ended June 30, 2026 | | | | | | | | | | | | | | $ | 2,795 | |
| | April 2022 Senior Convertible Note | | | September 2022 Senior Convertible Note | | | Sum of Balance Sheet Fair Value Components | | | Other Income (expense) | |
Fair Value - March 31, 2025 | | $ | — | | | $ | 6,600 | | | $ | 6,600 | | | $ | — | |
Change in fair value | | | — | | | | 200 | | | | 200 | | | | (200 | ) |
Fair Value at June 30, 2025 | | $ | — | | | $ | 6,800 | | | $ | 6,800 | | | | | |
Other Income (Expense) - Change in fair value – three month period ended June 30, 2025 | | | | | | | | | | | | | | $ | (200 | ) |
| | April 2022 Senior Convertible Note | | | September 2022 Senior Convertible Note | | | Sum of Balance Sheet Fair Value Components | | | Other Income (expense) | |
Fair Value - December 31, 2024 | | $ | 20,300 | | | $ | 8,800 | | | $ | 29,100 | | | $ | — | |
Installment repayments – common stock | | | — | | | | (176 | ) | | | (176 | ) | | | — | |
Non-installment payments – common stock | | | — | | | | (26 | ) | | | (26 | ) | | | — | |
Principal paydown through exchange | | | (17,602 | ) | | | (871 | ) | | | (18,473 | ) | | | — | |
Non-installment payment through exchange | | | (2,772 | ) | | | (1,102 | ) | | | (3,874 | ) | | | — | |
Change in fair value | | | 74 | | | | 175 | | | | 249 | | | | (249 | ) |
Fair Value at June 30, 2025 | | $ | — | | | $ | 6,800 | | | $ | 6,800 | | | | | |
Other Income (Expense) - Change in fair value – six months ended June 30, 2025 | | | | | | | | | | | | | | $ | (249 | ) |
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