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CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Statement [Abstract]      
Revenue $ 18,079 $ 9,065 $ 4,312
Cost of revenue 18,739 12,855 10,198
Gross loss (660) (3,790) (5,886)
Research and development expenses 85,424 102,667 102,503
General and administrative expenses 34,828 33,259 31,761
Selling and marketing expenses 6,685 7,156 7,638
Litigation settlement, net 0 11,500 0
Total operating expenses 126,937 154,582 141,902
Operating loss (127,597) (158,372) (147,788)
Interest income 2,738 7,712 8,925
Fair value at issuance of Series A warrants 0 0 (6,500)
Change in fair value of warrant liabilities (21,453) (1,486) (182)
Fair value gain on settlement of share subscription liability 1,651 0 0
Other income (expense), net (459) 56 (3,788)
Net loss before income taxes (145,120) (152,090) (149,333)
Income tax provision 308 171 0
Net loss (145,428) (152,261) (149,333)
Unrealized (loss) gain on available-for-sale securities (51) 134 3,498
Total comprehensive loss $ (145,479) $ (152,127) $ (145,835)
Net loss per share, basic $ (2.55) $ (2.85) $ (3.29)
Net loss per share, diluted $ (2.55) $ (2.85) $ (3.29)
Weighted-average shares used in computing net loss per share, basic 57,023,024 53,359,685 45,412,155
Weighted-average shares used in computing net loss per share, diluted 57,023,024 53,359,685 45,412,155