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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Assets    
Cash and cash equivalents $ 94,640 $ 326,028
Investment securities, available-for-sale 445,651 305,930
Accounts receivable, net 60,696 48,247
Interest and other receivables 972 2,035
Inventory 14,336 9,682
Prepaid expenses 24,622 25,694
Total current assets 640,917 717,616
Property and equipment, net 8,581 9,161
Operating lease right-of-use assets 60,032 47,283
Restricted cash 5,770 5,770
Other assets 2,373 2,786
Total assets 717,673 782,616
Liabilities and stockholders’ equity    
Accounts payable 7,722 8,493
Accrued liabilities 80,496 97,474
Total current liabilities 88,218 105,967
Operating lease liabilities 57,677 44,460
Other long-term liabilities 4,823 5,180
Total liabilities 150,718 155,607
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at September 30, 2021 and December 31, 2020; no shares issued and outstanding at September 30, 2021 and December 31, 2020
Common stock, $0.0001 par value; 225,000,000 shares authorized at September 30, 2021 and December 31, 2020; 160,690,916 shares and 159,637,771 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively 16 16
Additional paid-in capital 2,677,422 2,612,663
Accumulated deficit (2,110,482) (1,985,706)
Accumulated other comprehensive (loss) income (1) 36
Total stockholders’ equity 566,955 627,009
Total liabilities and stockholders’ equity $ 717,673 $ 782,616