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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Assets    
Cash and cash equivalents $ 173,059 $ 189,680
Investment securities, available-for-sale 478,347 507,749
Accounts receivable, net 41,636 35,781
Interest and other receivables 2,935 2,093
Inventory 6,318 6,341
Prepaid expenses 22,126 18,606
Total current assets 724,421 760,250
Property and equipment, net 5,089 3,180
Operating lease right-of-use assets 8,613 9,524
Intangible assets, net 2,215 2,585
Restricted cash 5,770 4,787
Other assets 1,342 2,857
Total assets 747,450 783,183
Liabilities and stockholders’ equity    
Accounts payable 6,623 7,222
Accrued liabilities 93,118 67,604
Total current liabilities 99,741 74,826
Operating lease liabilities 6,090 6,361
Other long-term liabilities 3,237 2,861
Total liabilities 109,068 84,048
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock, $0.0001 par value; 5,000,000 shares authorized at March 31, 2020 and December 31, 2019; no shares issued and outstanding at March 31, 2020 and December 31, 2019
Common stock, $0.0001 par value; 225,000,000 shares authorized at March 31, 2020 and December 31, 2019; 155,441,052 shares and 155,275,300 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively 15 15
Additional paid-in capital 2,428,987 2,402,945
Accumulated deficit (1,792,145) (1,704,122)
Accumulated other comprehensive income 1,525 297
Total stockholders’ equity 638,382 699,135
Total liabilities and stockholders’ equity $ 747,450 $ 783,183