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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 82,537 $ 141,522
Marketable securities 267,080 202,752
Accounts receivable 2,422 5,145
Prepaid expenses and other current assets 6,564 7,335
Total current assets 358,603 356,754
Marketable securities 96,797 93,097
Property and equipment, net 11,559 15,569
Right-of-use assets 31,936 43,648
Restricted cash and other non-current assets 5,755 5,253
Total assets 504,650 514,321
Current liabilities:    
Accounts payable 10,411 9,511
Accrued expenses 30,278 31,296
Deferred revenue, current 8,221 8,221
Operating lease liabilities 9,693 11,082
Total current liabilities 58,603 60,110
Operating lease liabilities, net of current portion 24,918 32,864
Deferred revenue, net of current portion 60,667 60,667
Total liabilities 144,188 153,641
Stockholders’ equity    
Preferred stock, $0.0001 par value per share: 5,000,000 shares authorized; no shares issued or outstanding 0 0
Common stock, $0.0001 par value per share: 195,000,000 shares authorized; 81,668,796 and 68,847,382 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively 8 7
Additional paid-in capital 1,574,382 1,442,405
Accumulated other comprehensive loss (1,452) (3,601)
Accumulated deficit (1,212,476) (1,078,131)
Total stockholders’ equity 360,462 360,680
Total liabilities and stockholders’ equity $ 504,650 $ 514,321