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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 272,756,000 $ 284,217,000
Short-term marketable securities 116,985,000 151,403,000
Prepaid expenses and other current assets 8,142,000 8,876,000
Total current assets 397,883,000 444,496,000
Property and equipment, net 24,621,000 24,815,000
Operating lease assets 39,794,000 40,418,000
Restricted cash 408,000 408,000
Other assets 4,836,000 4,772,000
Total assets 467,542,000 514,909,000
Current liabilities:    
Accounts payable 3,353,000 23,049,000
Accrued expenses and other current liabilities 19,052,000 24,336,000
Operating lease liabilities 3,118,000 1,305,000
Total current liabilities 25,523,000 48,690,000
Operating lease liabilities, net of current portion 54,937,000 53,793,000
Other liabilities 630,000 573,000
Total liabilities 81,090,000 103,056,000
Commitments and contingencies (Note 11)
Stockholders' equity:    
Preferred stock, $0.0001 par value; 80,000,000 shares authorized at March 31, 2023 and December 31, 2022; no shares issued and outstanding at March 31, 2023 and December 31, 2022
Common stock, $0.0001 par value; 800,000,000 shares authorized at March 31, 2023 and December 31, 2022; 150,647,707 and 150,448,363 shares issued at March 31, 2023 and December 31, 2022, respectively; 149,699,528 and 149,333,258 shares outstanding at March 31, 2023 and December 31, 2022, respectively 15,000 15,000
Additional paid-in capital 901,121,000 893,850,000
Accumulated other comprehensive loss (514,000) (1,041,000)
Accumulated deficit (514,170,000) (480,971,000)
Total stockholders' equity 386,452,000 411,853,000
Total liabilities and stockholders' equity $ 467,542,000 $ 514,909,000