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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 $ (25,295) $ (48,397)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 176 144
Stock-based compensation 3,043 4,302
Amortization/accretion of debt-related costs 401 517
Accretion of marketable securities purchased at a discount (1,326) (1,399)
Other non-cash adjustments (1,540) 1,173
Changes in operating assets and liabilities:    
Decrease (increase) in accounts receivable 1,026 (516)
Decrease (increase) in inventories 30 (133)
Decrease (increase) in prepaid expenses and other current assets 1,213 (1,879)
Decrease in other long-term assets 186 166
Decrease in accounts payable and other liabilities (21,692) (9,108)
Net cash used in operating activities (43,778) (55,130)
Cash flows from investing activities:    
Purchases of investments (64,971) (183,224)
Maturities of investments 105,553 73,000
Net cash provided by (used in) investing activities 40,582 (110,224)
Cash flows from financing activities:    
Proceeds from issuance of common stock for equity incentive plans 0 88
Proceeds from issuance of preferred stock, net of fees 0 241,425
Payments for tax withholding on share-based compensation vesting 572 1,730
Other debt financing fees 0 (400)
Net cash (used in) provided by financing activities (572) 239,383
Net (decrease) increase in cash and cash equivalents (3,768) 74,029
Cash and cash equivalents at beginning of period 66,656 22,465
Cash and cash equivalents at end of period 62,888 96,494
Supplemental disclosure of cash flow information:    
Cash paid for interest 2,968 3,257
Supplemental disclosure of non-cash investing and financing activities:    
Accrued financing costs $ 0 $ 150