Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 101,136 $ 92,795
Marketable securities 53,153 92,975
Collaboration receivable 300,000 0
Prepaid expenses and other current assets 5,273 4,917
Total current assets 459,562 190,687
Property and equipment, net 17,563 19,528
Restricted cash 1,733 1,733
Other assets 2,400 842
Operating lease right-of-use assets 38,516 42,804
Total assets 519,774 255,594
Current liabilities:    
Accounts payable 3,819 3,680
Accrued expenses and other current liabilities 9,562 9,161
Operating lease liabilities 6,994 3,981
Deferred revenue 28,317 2,024
Total current liabilities 48,692 18,846
Notes payable, net of discount 0 19,654
Operating lease liabilities, net of current portion 51,338 58,361
Deferred revenue, net of current portion 322,730 12,546
Other liabilities 143 0
Total liabilities 422,903 109,407
Commitments and contingencies (Note 13)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 25,000,000 shares authorized as of December 31, 2021 and 2020; no shares issued or outstanding 0 0
Common stock, $0.0001 par value; 175,000,000 shares authorized at December 31, 2021 and 2020; 41,299,720 shares issued and outstanding at December 31, 2021 and 36,790,946 shares issued and outstanding at December 31, 2020 4 4
Additional paid-in capital 361,133 309,126
Accumulated other comprehensive loss (10) (7)
Accumulated deficit (264,256) (162,936)
Total stockholders’ equity 96,871 146,187
Total liabilities and stockholders’ equity $ 519,774 $ 255,594