v3.23.3
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities    
Net loss $ (50,266) $ (70,697)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 366 374
Stock-based compensation 4,160 4,580
Net (accretion) amortization of investments in marketable debt securities (534) 234
Non-cash rent expense 2,525 2,644
Changes in operating assets and liabilities:    
Accounts receivable from collaboration 944 (910)
Prepaid expenses and other current assets 951 2,060
Other assets 337 90
Accounts payable (1,735) (717)
Accrued research and development expenses (1,503) 1,062
Other accrued expenses (3,429) (1,182)
Operating lease liabilities (2,720) (2,747)
Net cash used in operating activities (50,904) (65,209)
Cash flows from investing activities    
Proceeds from maturities of marketable securities 46,315 66,000
Purchases of property and equipment (184) (102)
Purchases of marketable securities (25,615) (18,820)
Proceeds from sale of marketable securities 0 27,000
Net cash provided by investing activities 20,516 74,078
Cash flows from financing activities    
Proceeds from the issuance of common stock under ATM equity offering program, net of issuance costs 4,546 0
Proceeds from the issuance of common stock under ESPP 80 177
Net cash provided by financing activities 4,626 177
Net (decrease) increase in cash and cash equivalents (25,762) 9,046
Cash and cash equivalents at the beginning of the period 52,418 45,627
Cash and cash equivalents at the end of the period 26,656 54,673
Supplemental non-cash investing and financing activities    
Operating lease liabilities arising from obtaining ROU assets $ 0 $ 171