| Schedule of outstanding debt |
The following tables summarize outstanding debt as of December 31, 2025 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | Stated | | | | | | | | Fair | | | | | | | Interest | | Conversion | | | | Remaining | | Value | | Carrying | | | Maturity Date | | Rate | | Price | | Face Value | | Debt Discount | | Adjustment | | Value | Short term convertible notes payable | | | | | | | | | | | | | | | | | | | | | 6% unsecured | | Due | | | 6 | % | $ | 3.09 | | $ | 135 | | $ | — | | $ | — | | $ | 135 | 8% unsecured | | Various | | | 8 | % | $ | 0.20 | | | 505 | | | — | | | — | | | 505 | | | | | | | | | | | | 640 | | | — | | | — | | | 640 | Long term convertible notes payable | | | | | | | | | | | | | | | | | | | | | 11% unsecured | | Various | | | 11 | % | | $0.21 - $0.22 | | | 325 | | | — | | | — | | | 325 | | | | | | | | | | | | 325 | | | — | | | — | | | 325 | Short term convertible notes at fair value | | | | | | | | | | | | | | | | | | | | | 0% unsecured | | Various | | | 0 | % | | Variable | | | 5,250 | | | — | | | 1,175 | | | 6,425 | 11% unsecured | | Various | | | 11 | % | | $0.21 - $0.30 | | | 26,815 | | | — | | | (5,047) | | | 21,768 | 12% unsecured | | Various | | | 12 | % | | $0.19 - $0.21 | | | 5,620 | | | — | | | (1,757) | | | 3,863 | | | | | | | | | | | | 37,685 | | | — | | | (5,629) | | | 32,056 | Short term notes payable | | | | | | | | | | | | | | | | | | | | | 0% unsecured | | On Demand | | | 0 | % | | N/A | | | 2,140 | | | — | | | — | | | 2,140 | 8% unsecured | | Various | | | 8 | % | | N/A | | | 6,921 | | | (156) | | | — | | | 6,765 | 12% unsecured | | On Demand | | | 12 | % | | N/A | | | 563 | | | — | | | — | | | 563 | | | | | | | | | | | | 9,624 | | | (156) | | | — | | | 9,468 | Long term convertible notes at fair value | | | | | | | | | | | | | | | | | | | | | 11% unsecured | | Various | | | 11 | % | | $0.19 - $0.25 | | | 5,150 | | | — | | | 70 | | | 5,220 | | | | | | | | | | | | 5,150 | | | — | | | 70 | | | 5,220 | Long term notes payable | | | | | | | | | | | | | | | | | | | | | 8% unsecured | | Various | | | 8 | % | | N/A | | | 13,220 | | | (887) | | | — | | | 12,333 | | | | | | | | | | | | | | | | | | | | | | Ending balance as of December 31, 2025 | | | | | | | | | | $ | 66,644 | | $ | (1,043) | | $ | (5,559) | | $ | 60,042 |
The following tables summarize outstanding debt as of December 31, 2024 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | Stated | | | | | | | | Fair | | | | | | | Interest | | Conversion | | | | Remaining | | Value | | Carrying | | | Maturity Date | | Rate | | Price | | Face Value | | Debt Discount | | Adjustment | | Value | Short term convertible notes payable | | | | | | | | | | | | | | | | | | | | | 6% unsecured | | Due | | | 6 | % | $ | 3.09 | | $ | 135 | | $ | — | | $ | — | | $ | 135 | 8% unsecured | | 2/21/2025 | | | 8 | % | $ | 0.50 | * | | 1,760 | | | (25) | | | — | | | 1,735 | | | | | | | | | | | | 1,895 | | | (25) | | | — | | | 1,870 | Short term convertible notes at fair value | | | | | | | | | | | | | | | | | | | | | 8% unsecured | | 2/15/2025 | | | 8 | % | $ | 0.27 | | | 1,000 | | | — | | | 95 | | | 1,095 | 10% unsecured | | 1/11/2025 | | | 10 | % | $ | 0.35 | | | 500 | | | — | | | 46 | | | 546 | 11% unsecured | | Various | | | 11 | % | | $0.26 - $0.46 | | | 15,250 | | | — | | | 1,433 | | | 16,683 | | | | | | | | | | | | 16,750 | | | — | | | 1,574 | | | 18,324 | Short term notes payable | | | | | | | | | | | | | | | | | | | | | 0% unsecured | | On Demand | | | 0 | % | | N/A | | | 2,140 | | | — | | | — | | | 2,140 | 6% secured | | 3/25/2025 | | | 6 | % | | N/A | | | 247 | | | — | | | — | | | 247 | 8% unsecured | | Various | | | 8 | % | | N/A | | | 11,660 | | | (424) | | | — | | | 11,236 | 12% unsecured | | On Demand | | | 12 | % | | N/A | | | 563 | | | — | | | — | | | 563 | | | | | | | | | | | | 14,610 | | | (424) | | | — | | | 14,186 | Long term convertible notes at fair value | | | | | | | | | | | | | | | | | | | | | 0% unsecured | | 1/19/2026 | | | 0 | % | | Variable | | | 5,000 | | | — | | | 918 | | | 5,918 | 11% unsecured | | Various | | | 11 | % | | $0.29 - $0.38 | | | 8,565 | | | — | | | 1,417 | | | 9,982 | | | | | | | | | | | | 13,565 | | | — | | | 2,335 | | | 15,900 | | | | | | | | | | | | | | | | | | | | | | Long term notes payable | | | | | | | | | | | | | | | | | | | | | 8% unsecured | | Various | | | 8 | % | | N/A | | | 13,210 | | | (814) | | | — | | | 12,396 | | | | | | | | | | | | | | | | | | | | | | Ending balance as of December 31, 2024 | | | | | | | | | | $ | 60,030 | | $ | (1,263) | | $ | 3,909 | | $ | 62,676 |
*These convertible notes are convertible into Series C preferred shares at $12.50 per share. Each Series C preferred share is convertible into common shares after a 30-day restriction period. The conversion price in common share equivalent is $0.50 per share.
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| Schedule of total interest expense related to outstanding debt |
The following table summarizes total interest expenses related to outstanding debt for the years ended December 31, 2025 and 2024, respectively (in thousands): | | | | | | | | | For the years ended | | | December 31, | | | 2025 | | 2024 | Interest expenses related to outstanding notes: | | | | | | | Contractual interest | | $ | 6,285 | | $ | 4,598 | Amortization of debt discount | | | 1,887 | | | 2,476 | Issuance costs | | | 499 | | | 676 | Total interest expenses related to outstanding notes | | | 8,671 | | | 7,750 | Other interest expenses | | | 24 | | | 17 | Total interest expense | | $ | 8,695 | | $ | 7,767 |
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| Schedule of principal amounts of the Company's debt obligations |
The following table summarizes the principal amounts of the Company’s debt obligations as of December 31, 2025 (in thousands): | | | | | | | | | | | | Payment Due by Period | | | | | | Less than | | 1 to 2 | | | Total | | 1 Year | | Years | Short term convertible notes payable | | | | | | | | | | 6% unsecured | | $ | 135 | | $ | 135 | | $ | — | 8% unsecured | | | 505 | | | 505 | | | — | Short term convertible notes payable at fair value | | | | | | | | | | 0% unsecured | | | 5,250 | | | 5,250 | | | — | 11% unsecured | | | 26,815 | | | 26,815 | | | — | 12% unsecured | | | 5,620 | | | 5,620 | | | — | Short term notes payable | | | | | | | | | | 0% unsecured | | | 2,140 | | | 2,140 | | | — | 8% unsecured | | | 6,921 | | | 6,921 | | | — | 12% unsecured | | | 563 | | | 563 | | | — | Long term convertible notes payable | | | | | | | | | | 11% unsecured | | | 325 | | | — | | | 325 | Long term convertible notes payable at fair value | | | | | | | | | | 11% unsecured | | | 5,150 | | | — | | | 5,150 | Long term notes payable | | | | | | | | | | 8% unsecured | | | 13,220 | | | — | | | 13,220 | Total | | $ | 66,644 | | $ | 47,949 | | $ | 18,695 |
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