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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Assets    
Cash and cash equivalents $ 204,920 $ 147,435
Investment securities, available-for-sale 241,057 373,271
Accounts receivable, net 62,713 64,366
Interest and other receivables 769 978
Inventory 7,009 7,881
Prepaid expenses 25,755 23,892
Total current assets 542,223 617,823
Property and equipment, net 7,531 8,047
Operating lease right-of-use assets 58,186 58,268
Restricted cash 5,770 5,770
Long-term inventory 6,205 6,217
Other assets 4,336 3,997
Total assets 624,251 700,122
Liabilities and stockholders’ equity    
Accounts payable 10,768 6,876
Accrued liabilities 108,835 89,192
Total current liabilities 119,603 96,068
Operating lease liabilities 55,478 56,126
Other long-term liabilities 4,373 7,034
Total liabilities 179,454 159,228
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at March 31, 2022 and December 31, 2021; no shares issued and outstanding at March 31, 2022 and December 31, 2021 0 0
Common stock, $0.0001 par value; 225,000,000 shares authorized at March 31, 2022 and December 31, 2022; 161,381,813 shares and 161,012,695 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively 16 16
Additional paid-in capital 2,712,025 2,694,646
Accumulated deficit (2,266,632) (2,153,576)
Accumulated other comprehensive loss (612) (192)
Total stockholders’ equity 444,797 540,894
Total liabilities and stockholders’ equity $ 624,251 $ 700,122