| Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| | | June 30, 2026 |
| | | Level 1 | | Level 2 | | Level 3 | | Total |
| Cash and cash equivalents (a) (b) | | $ | 44,895 | | | $ | — | | | $ | — | | | $ | 44,895 | |
| Restricted cash and cash equivalents (a) (c) | | | 300 | | | | — | | | | — | | | | 300 | |
| Marketable securities: | | | | | | | | | | | | | | | | |
| Equity securities | | | 41 | | | | — | | | | — | | | | 41 | |
| Total marketable securities | | | 41 | | | | — | | | | — | | | | 41 | |
| Convertible promissory note | | | — | | | | — | | | | 1,968 | | | | 1,968 | |
| Total | | $ | 45,236 | | | $ | — | | | $ | 1,968 | | | $ | 47,204 | |
| | | December 31, 2025 |
| | | Level 1 | | Level 2 | | Level 3 | | Total |
| Cash and cash equivalents (a) (b) | | $ | 41,317 | | | $ | — | | | $ | — | | | $ | 41,317 | |
| Restricted cash and cash equivalents (a) (c) | | | — | | | | — | | | | — | | | | — | |
| Marketable securities: | | | | | | | | | | | | | | | | |
| Equity securities | | | 36 | | | | — | | | | — | | | | 36 | |
| Total marketable securities | | | 36 | | | | — | | | | — | | | | 36 | |
| Convertible promissory note | | | — | | | | — | | | | — | | | | — | |
| Total | | $ | 41,353 | | | $ | — | | | $ | — | | | $ | 41,353 | |
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
| | | Three Months Ended June 30, 2026 |
| | | Fair Value Beginning of Period | | Net Realized and Unrealized Gains (Losses) Included in Income | | Purchases and Sales, Net | | Fair Value End of Period |
| Assets: | | | | | | | | | | | | | | | | |
| Convertible promissory note | | $ | — | | | $ | — | | | $ | 1,968 | | | $ | 1,968 | |
| Total | | $ | — | | | $ | — | | | $ | 1,968 | | | $ | 1,968 | |
| | | Three Months Ended June 30, 2025 |
| | | Fair Value Beginning of Period | | Net Realized and Unrealized Gains (Losses) Included in Income | | Purchases and Sales, Net | | Fair Value End of Period |
| Assets: | | | | | | | | | | | | | | | | |
| Convertible promissory note | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| Total | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | Six Months Ended June 30, 2026 |
| | | Fair Value Beginning of Year | | Net Realized and Unrealized Gains (Losses) Included in Income | | Purchases and Sales, Net | | Fair Value End of Period |
| Assets: | | | | | | | | | | | | | | | | |
| Convertible promissory note | | $ | — | | | $ | — | | | $ | 1,968 | | | $ | 1,968 | |
| Total | | $ | — | | | $ | — | | | $ | 1,968 | | | $ | 1,968 | |
| | | Six Months Ended June 30, 2025 |
| | | Fair Value Beginning of Year | | Net Realized and Unrealized Gains (Losses) Included in Income | | Purchases and Sales, Net | | Fair Value End of Period |
| Assets: | | | | | | | | | | | | | | | | |
| Convertible promissory note | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| Total | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | Three Months Ended June 30, 2026 |
| | | Purchases | | Sales | | Purchases and Sales, Net |
| Assets: | | | | | | | | | | | | |
| Convertible promissory note | | $ | 1,968 | | | $ | — | | | $ | 1,968 | |
| Total | | $ | 1,968 | | | $ | — | | | $ | 1,968 | |
| | | Three Months Ended June 30, 2025 | |
| | | Purchases | | Sales | | Purchases and Sales, Net |
| Assets: | | | | | | | | | | | | |
| Convertible promissory note | | $ | — | | | $ | — | | | $ | — | |
| Total | | $ | — | | | $ | — | | | $ | — | |
| | | Six Months Ended June 30, 2026 |
| | | Purchases | | Sales | | Purchases and Sales, Net |
| Assets: | | | | | | | | | | | | |
| Convertible promissory note | | $ | 1,968 | | | $ | — | | | $ | 1,968 | |
| Total | | $ | 1,968 | | | $ | — | | | $ | 1,968 | |
| | | Six Months Ended June 30, 2025 |
| | | Purchases | | Sales | | Purchases and Sales, Net |
| Assets: | | | | | | | | | | | | |
| Convertible promissory note | | $ | — | | | $ | — | | | $ | — | |
| Total | | $ | — | | | $ | — | | | $ | — | |
|