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Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Current assets:    
Cash and cash equivalents $ 35,658 $ 58,022
Marketable securities 237,235 280,903
Prepaid expenses and other current assets 4,776 5,930
Trade receivables, net 19,765 11,094
Total current assets 297,434 355,949
Fixed assets, net 7,601 8,974
Deposits and other assets 528 358
Total assets 305,563 365,281
Current liabilities:    
Accounts payable and accrued expenses 42,183 45,247
Deferred revenue 726 139
Total current liabilities 42,909 45,386
Long-term debt 94,936 91,848
Other long-term liabilities 2,094 2,046
Total liabilities 139,939 139,280
Stockholders' equity:    
Common stock, $0.001 par value. Authorized 125,000,000 shares; issued and outstanding 34,083,319 shares at June 30, 2016. Authorized 125,000,000 shares; issued and outstanding 33,916,559 shares at December 31, 2015 34 34
Additional paid-in capital 837,850 820,165
Accumulated other comprehensive income (loss) 885 (1,200)
Accumulated deficit (673,145) (592,998)
Total stockholders' equity 165,624 226,001
Total liabilities and stockholders' equity $ 305,563 $ 365,281