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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 58,533 $ 59,968
Marketable securities 301,347 306,165
Accounts receivable   2,000
Restricted cash 856 567
Prepaid expenses and other current assets 10,155 6,572
Total current assets 370,891 375,272
Property and equipment, net 10,261 10,884
Operating lease right-of-use assets 44,422 46,886
Restricted cash, net of current portion 2,567 3,423
Other assets 48 5
Total assets 428,189 436,470
Current liabilities:    
Accounts payable 2,837 4,453
Accrued expenses and other current liabilities 11,467 17,495
Operating lease liabilities 2,040 1,770
Deferred revenue 27,072 31,792
Income tax payable   35
Total current liabilities 43,416 55,545
Operating lease liabilities, net of current portion 37,466 39,361
Deferred revenue, net of current portion 70,712 92,088
Total liabilities 151,594 186,994
Commitments and contingencies (Note 7)
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively
Stockholders' equity:    
Common stock, $0.001 par value; 200,000,000 shares authorized at September 30, 2023 and December 31, 2022;104,187,733 and 88,179,374 shares issued and outstanding as of September 30, 2023 and December 31, 2022, respectively 102 88
Additional paid-in capital 617,667 522,605
Accumulated other comprehensive loss (681) (3,705)
Accumulated deficit (340,493) (269,512)
Total stockholders' equity 276,595 249,476
Total liabilities and stockholders' equity $ 428,189 $ 436,470