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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Assets    
Cash and cash equivalents $ 310,441 $ 189,680
Investment securities, available-for-sale 348,110 507,749
Accounts receivable, net 43,785 35,781
Interest and other receivables 2,343 2,093
Inventory 6,210 6,341
Prepaid expenses 24,846 18,606
Total current assets 735,735 760,250
Property and equipment, net 6,687 3,180
Operating lease right-of-use assets 7,880 9,524
Intangible assets, net 1,846 2,585
Restricted cash 5,770 4,787
Other assets 1,731 2,857
Total assets 759,649 783,183
Liabilities and stockholders’ equity    
Accounts payable 6,466 7,222
Accrued liabilities 79,956 67,604
Total current liabilities 86,422 74,826
Operating lease liabilities 5,669 6,361
Other long-term liabilities 4,545 2,861
Total liabilities 96,636 84,048
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at June 30, 2020 and December 31, 2019; no shares issued and outstanding at June 30, 2020 and December 31, 2019
Common stock, $0.0001 par value; 225,000,000 shares authorized at June 30, 2020 and December 31, 2019; 157,383,379 shares and 155,275,300 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively 15 15
Additional paid-in capital 2,495,804 2,402,945
Accumulated deficit (1,834,286) (1,704,122)
Accumulated other comprehensive income 1,480 297
Total stockholders’ equity 663,013 699,135
Total liabilities and stockholders’ equity $ 759,649 $ 783,183