v3.26.1
Notes Payable - Schedule of Note Payable Rollforward (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
May 15, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Notes Payable [Roll Forward]          
Fair value measurement adjustments   $ 3,107 $ 13,283 $ 6,448 $ 23,380
Debt issuance costs   5,497 1,801 6,657 2,230
Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   46,367 24,674 60,666 49,488
Original principal balance   71,174 13,787 77,053 25,690
Repayments of debt     0 (132) (6)
Conversion of Debt to Equity   (14,640) (19,207) (39,957) (34,052)
Gain (loss) on fair value adjustment of debts   3,045 (8,723) (2,167) 13,057
Other Adjustments   72 56 131 (30)
Ending balance   99,928 28,033 99,928 28,033
Secured SPA Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance     2,389   5,457
Original principal balance     0   0
Repayments of debt     0   0
Conversion of Debt to Equity     (2,946)   (3,535)
Gain (loss) on fair value adjustment of debts     (557)   1,922
Other Adjustments     0   0
Ending balance     0   0
2023 Unsecured SPA Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   4,356 0 6,668 6,716
Original principal balance   450 4,500 4,050 4,500
Repayments of debt     0 0 0
Conversion of Debt to Equity   (712) 0 (7,436) (4,692)
Gain (loss) on fair value adjustment of debts   (149) (39) (961) 1,985
Other Adjustments   0 0 0 0
Ending balance   4,243 4,539 4,243 4,539
Unsecured Convertible Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   4,139   3,442  
Original principal balance   724   1,100  
Repayments of debt       0  
Conversion of Debt to Equity   0   0  
Gain (loss) on fair value adjustment of debts   (80) 0 (401) 0
Other Adjustments   0   0  
Ending balance   4,943   4,943  
Junior Secured SPA Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   7,263 6,060 11,402 26,059
Original principal balance   0 0 0 0
Repayments of debt     0 0 0
Conversion of Debt to Equity   (2,580) (6,904) (7,726) (16,468)
Gain (loss) on fair value adjustment of debts   80 (844) (927) 9,591
Other Adjustments   0 0 0 0
Ending balance   4,603 0 4,603 0
2024 Unsecured SPA Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   40 11,330 5,818 7,032
Original principal balance   0 0 0 11,096
Repayments of debt     0 0 0
Conversion of Debt to Equity   0 (5,847) (6,300) (5,847)
Gain (loss) on fair value adjustment of debts   2 (4,526) (520) 2,272
Other Adjustments   0 0 0
Ending balance   38 10,009 38 10,009
2025 March Unsecured SPA Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   3,442 763 2,108 0
Original principal balance   0 9,287 1,903 10,094
Repayments of debt     0 0 0
Conversion of Debt to Equity   0 (3,510) (656) (3,510)
Gain (loss) on fair value adjustment of debts   69 (2,757) (18) (2,713)
Other Adjustments   0 0 0 0
Ending balance   3,373 9,297 3,373 9,297
2025 July Unsecured SPA Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   22,778   26,796 0
Original principal balance   0   0 0
Repayments of debt       0 0
Conversion of Debt to Equity   (11,348)   (17,839) 0
Gain (loss) on fair value adjustment of debts   (225)   (2,698) 0
Other Adjustments     0 0
Ending balance   11,655 0 11,655 0
Notes payable – China other | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   4,349 4,132 4,290 4,173
Original principal balance   0 0 0 0
Repayments of debt     0 0 0
Conversion of Debt to Equity   0 0 0 0
Gain (loss) on fair value adjustment of debts   0 0 0 0
Other Adjustments   72 56 131 15
Ending balance   4,421 4,188 4,421 4,188
Secured Streeterville Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   0   0  
Original principal balance   45,000   45,000  
Repayments of debt       0  
Conversion of Debt to Equity   0   0  
Gain (loss) on fair value adjustment of debts   1,904   1,904  
Other Adjustments   0   0  
Ending balance   43,096   43,096  
May 2026 Convertible Notes          
Notes Payable [Roll Forward]          
Original principal balance $ 27,000        
May 2026 Convertible Notes | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance   0   0  
Original principal balance   25,000   25,000  
Repayments of debt       0  
Conversion of Debt to Equity   0   0  
Gain (loss) on fair value adjustment of debts   1,444   1,444  
Other Adjustments   0   0  
Ending balance   23,556   23,556  
2025 Convertible Note - AIXC | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance       142  
Original principal balance       0  
Repayments of debt       (132)  
Conversion of Debt to Equity       0  
Gain (loss) on fair value adjustment of debts       10  
Other Adjustments       0  
Ending balance   $ 0   $ 0  
Auto loans | Notes Payable          
Notes Payable [Roll Forward]          
Beginning balance         51
Original principal balance         0
Repayments of debt         (6)
Conversion of Debt to Equity         0
Gain (loss) on fair value adjustment of debts         0
Other Adjustments         (45)
Ending balance     $ 0   $ 0