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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets    
Cash and cash equivalents $ 833,751 $ 850,117
Unbilled other receivable   5,815
Prepaid expenses and other current assets 6,394 7,545
Total current assets 840,145 863,477
Property and equipment, net 41 48
Other assets 463 107
Total assets 840,649 863,632
Current liabilities    
Accounts payable 3,792 60
Accrued expenses and other current liabilities 15,104 14,368
Deferred revenue 235,382 301,367
Total current liabilities 254,278 315,795
Other liabilities 113 36
Total liabilities 254,391 315,831
Commitments and contingencies (see Note 11)
Stockholders’ equity:    
Preferred stock, $0.001 par value per share; 10,000,000 shares authorized; no shares issued and outstanding as of March 31, 2021 and December 31, 2020
Common stock, $0.001 par value; 300,000,000 shares authorized as of March 31, 2021 and December 31, 2020, respectively; 82,736,937 and 82,436,937 shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively 83 82
Additional paid-in capital 620,622 612,879
Accumulated deficit (34,447) (65,160)
Total stockholders’ equity 586,258 547,801
Total liabilities and stockholders’ equity $ 840,649 $ 863,632