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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Assets    
Cash and cash equivalents $ 452,352 $ 189,680
Investment securities, available-for-sale 192,089 507,749
Accounts receivable, net 46,344 35,781
Interest and other receivables 1,440 2,093
Inventory 7,979 6,341
Prepaid expenses 30,009 18,606
Total current assets 730,213 760,250
Property and equipment, net 8,427 3,180
Operating lease right-of-use assets 48,232 9,524
Intangible assets, net 1,477 2,585
Restricted cash 5,770 4,787
Other assets 1,545 2,857
Total assets 795,664 783,183
Liabilities and stockholders’ equity    
Accounts payable 3,471 7,222
Accrued liabilities 88,385 67,604
Total current liabilities 91,856 74,826
Operating lease liabilities 45,343 6,361
Other long-term liabilities 3,598 2,861
Total liabilities 140,797 84,048
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at September 30, 2020 and December 31, 2019; no shares issued and outstanding at September 30, 2020 and December 31, 2019
Common stock, $0.0001 par value; 225,000,000 shares authorized at September 30, 2020 and December 31, 2019; 158,863,541 shares and 155,275,300 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively 16 15
Additional paid-in capital 2,573,288 2,402,945
Accumulated deficit (1,918,946) (1,704,122)
Accumulated other comprehensive income 509 297
Total stockholders’ equity 654,867 699,135
Total liabilities and stockholders’ equity $ 795,664 $ 783,183