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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Assets    
Cash and cash equivalents $ 147,435 $ 326,028
Investment securities, available-for-sale 373,271 305,930
Accounts receivable, net 64,366 48,247
Interest and other receivables 978 2,035
Short term inventory 7,881 9,682
Prepaid expenses 23,892 25,694
Total current assets 617,823 717,616
Property and equipment, net 8,047 9,161
Operating lease right-of-use assets 58,268 47,283
Intangible assets, net 0 1,108
Restricted cash 5,770 5,770
Long-term inventory 6,217
Other assets 3,997 1,678
Total assets 700,122 782,616
Liabilities and stockholders’ equity    
Accounts payable 6,876 8,493
Accrued liabilities 89,192 97,474
Total current liabilities 96,068 105,967
Operating lease liabilities 56,126 44,460
Other long-term liabilities 7,034 5,180
Total liabilities 159,228 155,607
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at December 31, 2021 and 2020; no shares issued and outstanding at December 31, 2021 and 2020 0 0
Common stock, $0.0001 par value; 225,000,000 shares authorized at December 31, 2021 and 2020; 161,012,695 shares and 159,637,771 shares issued and outstanding at December 31, 2021 and 2020, respectively 16 16
Additional paid-in capital 2,694,646 2,612,663
Accumulated deficit (2,153,576) (1,985,706)
Accumulated other comprehensive (loss) income (192) 36
Total stockholders’ equity 540,894 627,009
Total liabilities and stockholders’ equity $ 700,122 $ 782,616