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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 454,620 $ 329,152
Marketable securities 413,951 406,099
Receivable from Collaboration partner 12,819 7,391
Prepaid expenses and other current assets 9,536 7,071
Total current assets 890,926 749,713
Property and equipment, net 26,228 27,330
Operating lease right-of-use assets 29,899 30,569
Restricted cash 1,472 1,472
Other assets 5,932 5,574
Total assets 954,457 814,658
Current liabilities:    
Accounts payable 6,752 4,749
Accrued clinical supply costs 12,618 8,748
Accrued liabilities 20,042 27,460
Deferred revenue, current portion 95,611 90,803
Operating lease liabilities, current portion 7,855 7,795
Total current liabilities 142,878 139,555
Deferred revenue, long-term portion 505,133 334,415
Operating lease liabilities, long-term portion 38,751 39,806
Other long-term liabilities 158 158
Total liabilities 686,920 513,934
Commitments and Contingencies
Stockholders' equity:    
Common stock, $0.0001 par value; 200,000,000 shares authorized; 81,248,646 and 79,316,261 shares issued and outstanding as of September 30, 2021 and December 31, 2020 8 8
Additional paid-in capital 762,458 748,036
Accumulated other comprehensive loss (3,935) (943)
Accumulated deficit (490,994) (446,377)
Total stockholders' equity 267,537 300,724
Total liabilities and stockholders’ equity $ 954,457 $ 814,658