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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 98,477 $ 123,665
Marketable securities 206,812 203,235
Receivable from collaboration partner and contract asset - related party 25,150 1,566
Research and development tax incentive receivable 2,878 2,792
Prepaid expenses and other current assets 8,205 9,478
Total current assets 341,522 340,736
Property and equipment, net 2,064 1,798
Restricted cash - noncurrent 225 225
Operating lease right-of-use asset 4,485 4,936
Total assets 348,296 347,695
Current liabilities:    
Accounts payable 7,159 1,600
Payable to collaboration partner - related party 380 899
Accrued expenses and other payables 32,874 37,716
Deferred revenue - related party 768 1,601
Operating lease liability - current 2,275 2,200
Total current liabilities 43,456 44,016
Operating lease liability - noncurrent 3,062 3,658
Total liabilities 46,518 47,674
Commitments and contingencies
Stockholders' equity:    
Preferred stock, $0.00001 par value, 10,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.00001 par value, 90,000,000 shares authorized 48,552,102 and 47,838,330 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively
Additional paid-in capital 732,542 709,682
Accumulated other comprehensive loss (472) (299)
Accumulated deficit (430,292) (409,362)
Total stockholders' equity 301,778 300,021
Total liabilities and stockholders' equity $ 348,296 $ 347,695