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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss $ (78,626) $ (69,104)
Adjustments to reconcile net loss to cash used in operating activities:    
Depreciation 1,184 493
Stock-based compensation expense 7,048 4,763
Amortization and interest accretion related to operating lease (334)  
Amortization of premium and discounts on marketable securities, net (220)  
Change in fair value of preferred stock warrant liability   (58)
Loss on disposal of fixed assets   134
Changes in operating assets and liabilities:    
Other receivables 26 4,183
Prepaids and other current and non-current assets 2,038 (1,784)
Accounts payable (369) (1,407)
Accrued expenses and other non-current liabilities 1,422 5,531
Operating lease liabilities, current and non-current (1,166) (2,016)
Net cash used in operating activities (68,997) (59,265)
Cash flows from investing activities:    
Purchases of property and equipment (2,599) (3,755)
Purchases of marketable securities (29,404)  
Net cash used in investing activities (32,003) (3,755)
Cash flows from financing activities:    
Issuance of common stock upon initial public offering, net of underwriters' fees   114,267
Payment of offering costs (442) (2,697)
Proceeds from issuance of common stock upon exercise of Series A-2 warrants   406
Proceeds from employee equity plans 253 217
Net cash provided by financing activities (189) 112,193
Effect of exchange rate changes on cash 286 (316)
Net (decrease) increase in cash, cash equivalents and restricted cash (100,903) 48,857
Cash, cash equivalents and restricted cash at beginning of period 183,225 134,368
Cash, cash equivalents and restricted cash at end of period 82,322 183,225
Components of cash, cash equivalents and restricted cash    
Cash and cash equivalents 80,774 181,752
Restricted Cash 1,548 1,473
Total cash, cash equivalents and restricted cash at end of period 82,322 183,225
Supplemental noncash investing and financing activities    
Property and equipment included in accounts payable and accrued expenses 14 363
Cash paid for taxes $ 2,702  
Lease assets obtained in exchange for new operating lease liabilities   $ 26,549