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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 417,881 $ 351,985
Marketable securities 228,813  
Prepaid assets 22,806 19,802
Restricted cash 1,016  
Other current assets 1,891 1,308
Total current assets 672,407 373,095
Non-current Assets:    
Right-of-use assets 13,715 14,110
Property and equipment, net 1,972 1,655
Other assets 845 385
Total assets 688,939 389,245
Current liabilities:    
Accounts payable 3,078 8,361
Accrued expenses 44,930 54,783
Current portion of right of use liabilities 2,732 2,609
Total current liabilities 50,740 65,753
Long-term liabilities:    
Convertible senior notes 144,561 142,567
Development derivative liability 223,245 134,839
Operating lease liabilities 11,396 11,857
Total liabilities 429,942 355,016
Stockholders' equity:    
Preferred stock, $0.0001 par value; 10.0 million shares authorized, and zero shares issued and outstanding at March 31, 2020 and December 31, 2019 0 0
Common stock, $0.0001 par value; 200.0 million shares authorized at March 31, 2020 and December 31, 2019; 75.4 million shares issued and outstanding at March 31, 2020, and 63.9 million shares issued and outstanding at December 31, 2019 7 6
Additional paid in capital 1,008,275 615,850
Accumulated other comprehensive income/(loss) 1,010 (154)
Accumulated deficit (750,295) (581,473)
Total stockholders' equity 258,997 34,229
Total liabilities and stockholders' equity $ 688,939 $ 389,245