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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net loss $ (64,053) $ (64,848)
Adjustments to reconcile net loss to net cash used in operating activities    
Stock-based compensation expense 10,456 7,978
Non-cash interest expense 1,436 1,968
Change in fair value of derivative liabilities 978 5,152
Depreciation and amortization expense 981 920
Loss on extinguishment of debt   27,950
Changes in operating assets and liabilities:    
Accounts receivable 7,167 (367)
Prepaid expenses and other current assets 3,934 128
Inventory (229) (269)
Accounts payable 7 1,693
Operating lease assets 117 413
Accrued expenses (5,145) (14,031)
Deferred revenue (64) (59)
Operating lease liabilities (256) (515)
Net cash used in operating activities (44,671) (33,887)
Cash flows from investing activities:    
Purchases of property and equipment (1,933) (255)
Net cash used in investing activities (1,933) (255)
Cash flows from financing activities:    
Proceeds from exercise of stock options 4,183 4,870
Proceeds from issuance of common stock and pre-funded warrants upon private placement, net of issuance costs   316,353
Net cash provided by financing activities 4,183 321,223
Net increase in cash, cash equivalents and restricted cash (42,421) 287,081
Cash, cash equivalents and restricted cash at beginning of period 393,716 197,571
Cash, cash equivalents and restricted cash at end of period 351,295 484,652
Supplemental disclosure of cash flow information:    
Cash paid for interest 2,140 12,967
Supplemental disclosure of non-cash investing and financing activities:    
Additions to property and equipment included in accounts payable and accrued expenses $ 564 $ 392