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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 201,477 $ 154,126
Marketable securities 146,649 145,983
Accounts receivable 6,745 6,001
Prepaids and other current assets 9,690 8,541
Deferred taxes 1,113 187
Total current assets 365,674 314,838
Intangible assets, net 76,694 89,371
Goodwill 116,899 116,899
Property, plant and equipment, net 60,689 64,023
Deferred taxes, long-term 454 536
Other assets 3,345 2,612
Total assets 623,755 588,279
Current liabilities:    
Accounts payable 5,187 6,962
Accrued salaries and benefits 11,857 14,840
Deferred revenue 6,551 4,133
Other current liabilities 7,774 8,723
Total current liabilities 31,369 34,658
Convertible notes, long-term 117,949 115,089
Long-term imputed financing obligation 38,874 39,063
Long-term income taxes payable 2,679 2,769
Other long-term liabilities 8,139 5,078
Total liabilities $ 199,010 $ 196,657
Commitments and contingencies (Notes 9 and 13)    
Stockholders’ equity:    
Convertible preferred stock, $.001 par value: Authorized: 5,000,000 shares Issued and outstanding: no shares at June 30, 2015 and December 31, 2014 $ 0 $ 0
Common stock, $.001 par value: Authorized: 500,000,000 shares Issued and outstanding: 116,360,766 shares at June 30, 2015 and 115,161,675 shares at December 31, 2014 116 115
Additional paid-in capital 1,170,159 1,153,435
Accumulated deficit (745,164) (761,526)
Accumulated other comprehensive loss (366) (402)
Total stockholders’ equity 424,745 391,622
Total liabilities and stockholders’ equity $ 623,755 $ 588,279