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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Assets    
Cash and cash equivalents $ 304,487 $ 326,028
Investment securities, available-for-sale 273,281 305,930
Accounts receivable, net 56,832 48,247
Interest and other receivables 558 2,035
Inventory 10,311 9,682
Prepaid expenses 28,515 25,694
Total current assets 673,984 717,616
Property and equipment, net 9,757 9,161
Operating lease right-of-use assets 63,111 47,283
Intangible assets, net 738 1,108
Restricted cash 5,770 5,770
Other assets 1,813 1,678
Total assets 755,173 782,616
Liabilities and stockholders’ equity    
Accounts payable 8,849 8,493
Accrued liabilities 100,524 97,474
Total current liabilities 109,373 105,967
Operating lease liabilities 60,581 44,460
Other long-term liabilities 3,613 5,180
Total liabilities 173,567 155,607
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at March 31, 2021 and December 31, 2020; no shares issued and outstanding at March 31, 2021 and December 31, 2020
Common stock, $0.0001 par value; 225,000,000 shares authorized at March 31, 2021 and December 31, 2020; 160,172,235 shares and 159,637,771 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively 16 16
Additional paid-in capital 2,633,710 2,612,663
Accumulated deficit (2,052,154) (1,985,706)
Accumulated other comprehensive income 34 36
Total stockholders’ equity 581,606 627,009
Total liabilities and stockholders’ equity $ 755,173 $ 782,616