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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 166,637 $ 141,714
Short-term investments in available-for-sale debt securities 503,525 509,199
Accounts receivable 115,318 57,406
Inventory 10,798 10,864
Other current assets 22,954 18,594
Total current assets 819,232 737,777
Restricted cash 4,706 5,477
Property and equipment, net 40,302 33,869
Long-term investments in available-for-sale debt securities 204,793 216,028
Investment in restricted equity securities 48,915  
Operating lease assets 61,987  
Total assets 1,179,935 993,151
Current liabilities:    
Accounts payable and accrued liabilities 102,357 86,377
Other current liabilities 13,295 1,856
Total current liabilities 115,652 88,233
Noncurrent operating lease liabilities 74,482  
Convertible senior notes 403,589 388,496
Other long-term liabilities 11,697 10,231
Deferred rent   18,114
Deferred gain on sale of real estate   7,312
Total liabilities 605,420 512,386
Stockholders’ equity:    
Preferred stock, $0.001 par value; 5,000 shares authorized; no shares issued and outstanding
Common stock, $0.001 par value; 220,000 shares authorized; issued and outstanding shares were 92,080 as of September 30, 2019 and 90,797 as of December 31, 2018 92 91
Additional paid-in capital 1,739,517 1,660,361
Accumulated other comprehensive income (loss) 1,606 (1,932)
Accumulated deficit (1,166,700) (1,177,755)
Total stockholders’ equity 574,515 480,765
Total liabilities and stockholders’ equity $ 1,179,935 $ 993,151