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Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Current assets:    
Cash and cash equivalents $ 40,165 $ 58,022
Marketable securities 258,547 280,903
Prepaid expenses and other current assets 5,104 5,930
Trade receivables, net 22,618 11,094
Total current assets 326,434 355,949
Fixed assets, net 8,426 8,974
Deposits and other assets 372 358
Total assets 335,232 365,281
Current liabilities:    
Accounts payable and accrued expenses 43,493 45,247
Deferred revenue 396 139
Total current liabilities 43,889 45,386
Long-term debt 93,366 91,848
Other long-term liabilities 1,976 2,046
Total liabilities 139,231 139,280
Stockholders' equity:    
Common stock, $0.001 par value. Authorized 125,000,000 shares; issued and outstanding 33,919,684 shares at March 31, 2016. Authorized 125,000,000 shares; issued and outstanding 33,916,559 shares at December 31, 2015 34 34
Additional paid-in capital 829,114 820,165
Accumulated other comprehensive income (loss) 1,084 (1,200)
Accumulated deficit (634,231) (592,998)
Total stockholders' equity 196,001 226,001
Total liabilities and stockholders' equity $ 335,232 $ 365,281