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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 415,560 $ 351,985
Marketable securities 312,598  
Prepaid assets 11,299 19,802
Restricted cash 1,255  
Other current assets 1,637 1,308
Total current assets 742,349 373,095
Non-current Assets:    
Right-of-use assets 18,545 14,110
Property and equipment, net 6,531 1,655
Other assets 909 385
Total assets 768,334 389,245
Current liabilities:    
Accounts payable 11,069 8,361
Accrued expenses 60,766 54,783
Current portion of right of use liabilities 3,438 2,609
Total current liabilities 75,273 65,753
Long-term liabilities:    
Convertible senior notes 353,769 142,567
Development derivative liability 217,778 134,839
Operating lease liabilities 15,674 11,857
Total liabilities 662,494 355,016
Commitments and contingencies (Note 11)
Stockholders' equity:    
Preferred stock, $0.0001 par value; 10.0 million shares authorized, and zero shares issued and outstanding at September 30, 2020 and December 31, 2019 0 0
Common stock, $0.0001 par value; 200.0 million shares authorized at September 30, 2020 and December 31, 2019; 75.7 million shares issued and outstanding at September 30, 2020, and 63.9 million shares issued and outstanding at December 31, 2019 8 6
Additional paid-in capital 1,112,203 615,850
Accumulated other comprehensive income/(loss) (1,759) (154)
Accumulated deficit (1,004,612) (581,473)
Total stockholders' equity 105,840 34,229
Total liabilities and stockholders' equity $ 768,334 $ 389,245