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Investments (Tables) | 12 Months Ended
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Dec. 31, 2025
Investments, All Other Investments [Abstract] |
Schedule of Investments |
| December 31, 2025 |  | December 31, 2024
| (in thousands)
Equity-method investments | $ | 19,495 |  |  | $ | 17,547 |
Investment in debt securities - AFS | 9,246 |  |  | 11,187 |
Total Investments | $ | 28,741 |  |  | $ | 28,734 |
Schedule of Carrying Amounts and Maximum exposure Relating to AeroFlexx | The Company’s carrying amounts and maximum exposure relating to AeroFlexx, were as follows (in thousands):
| December 31, 2025 |  | December 31, 2024
Asset type | Carrying Amount |  | Maximum Exposure to Loss |  | Carrying Amount |  | Maximum Exposure to Loss
Equity method investment in AeroFlexx | $ | 18,957 |  |  | $ | 18,957 |  |  | $ | 16,930 |  |  | $ | 16,930 |
Investments in debt securities - AFS | 9,246 |  |  | 9,246 |  |  | 11,187 |  |  | 11,187 |
Due from related party | 10,754 |  |  | 10,754 |  |  | 4,472 |  |  | 4,472 |
Total | $ | 38,957 |  |  | $ | 38,957 |  |  | $ | 32,589 |  |  | $ | 32,589 |
Schedule of Financial Information of Equity Method Investments | Balance sheets (in thousands)
| ESG Fund |  | AeroFlexx
| December 31, |  | December 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
Total Assets | $ | 85,712 |  |  | $ | 97,445 |  |  | $ | 15,709 |  |  | $ | 17,002 |
Total Liabilities | 575 |  |  | 93 |  |  | 29,082 |  |  | 27,861 |
Total Equity (Deficit) | $ | 85,137 |  |  | $ | 97,352 |  |  | $ | (13,373) |  |  | $ | (10,859) |
Statements of operation (in thousands)
| ESG Fund |  | AeroFlexx
| Years ended December 31, |  | Years ended December 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
Revenue | $ | — |  |  | $ | 202 |  |  | $ | 85 |  |  | $ | 38 |
Gross (Loss) Profit | — |  |  | (735) |  |  | (95) |  |  | (57) |
Net Income (Loss) | $ | (12,263) |  |  | $ | 39,437 |  |  | $ | (15,824) |  |  | $ | (13,663) |
Schedule of Unrealized Gains and Losses, and Fair Value of AFS Debt Securities | The amortized cost, gross unrealized gains and losses, and fair value of AFS debt securities is represented in the table below (in thousands):
| Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value
December 31, 2025 |  |  |  |  |  |  |
Investment in Debt Securities - AFS | $ | 10,444 |  |  | $ | — |  |  | $ | (1,198) |  |  | $ | 9,246 |
December 31, 2024 |  |  |  |  |  |  |
Investment in Debt Securities - AFS | $ | 10,278 |  |  | $ | 909 |  |  | $ | — |  |  | $ | 11,187 |
Schedule of Contractual Maturity of Debt Securities | The amortized cost and fair value of debt securities, by contractual maturity, as of December 31, 2025 is shown below (in thousands). Expected maturities can differ from contractual maturities.
| Amortized cost |  | Fair value
Due within one year | $ | 10,444 |  |  | $ | 9,246 |
| $ | 10,444 |  |  | $ | 9,246 |

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