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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 195,734 $ 254,712
Short-term investments, available for sale 439,609 261,217
Accounts receivable 54,097 31,127
Inventory 6,054 1,024
Other current assets 18,900 6,839
Total current assets 714,394 554,919
Property and equipment, net 28,618 10,811
Long-term investments, available for sale 185,257 247,361
Restricted cash 5,477 4,500
Total assets 933,746 817,591
Current liabilities:    
Accounts payable and accrued liabilities 72,022 53,520
Current portion of convertible senior notes 383,647 0
Other current liabilities 731 906
Total current liabilities 456,400 54,426
Deferred gain on sale of real estate 7,495 8,043
Deferred revenue 10,231 10,231
Deferred rent 12,107 3,135
Convertible senior notes 0 369,618
Total liabilities 486,233 445,453
Commitments and contingencies
Stockholders’ equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued and outstanding 0 0
Common stock, $0.001 par value; 220,000,000 shares authorized; issued and outstanding shares were 90,673,214 as of September 30, 2018 and 88,793,903 as of December 31, 2017 91 89
Additional paid-in capital 1,645,311 1,572,765
Accumulated other comprehensive loss (2,056) (1,850)
Accumulated deficit (1,195,833) (1,198,866)
Total stockholders’ equity 447,513 372,138
Total liabilities and stockholders’ equity $ 933,746 $ 817,591