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Condensed Statements of Cash Flows - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Operating Activities    
Net loss $ (39,061) $ (29,051)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation expense 420 293
Non-cash operating lease expense 999 612
Stock-based compensation expense 5,022 3,233
Net amortization of premiums and accretion of discounts on investments   1
Changes in operating assets and liabilities:    
Prepaid expenses and other current assets (333) 2,345
Other assets (1,236) (744)
Accounts payable (2,176) 665
Accrued expenses and other current liabilities. 3,836 (823)
Operating lease liabilities 499 (575)
Net cash used in operating activities (32,030) (24,044)
Investing Activities    
Purchase of property and equipment (35) (2,906)
Maturities of investments   1,150
Net cash used in investing activities (35) (1,756)
Financing Activities    
Proceeds from stock option exercise 116 201
Net cash provided by financing activities 116 201
Net decrease in cash, cash equivalents, and restricted cash (31,949) (25,599)
Cash, cash equivalents, and restricted cash at the beginning of the period 177,236 112,250
Cash, cash equivalents, and restricted cash at the end of the period 145,287 86,651
Non-cash financing and investing activities:    
Acquisition of operating lease right-of-use assets   11,639
Acquisition of property and equipment in accounts payable and accrued liabilities 34 375
Reconciliation of cash and cash equivalents and restricted cash:    
Cash and cash equivalents 144,918 86,300
Restricted cash 369 351
Cash, cash equivalents, and restricted cash at the end of the period $ 145,287 $ 86,651