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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Current assets:    
Cash and cash equivalents $ 136,629 $ 143,764
Marketable securities 88,943 143,942
Accounts receivable 14,617 16,408
Prepaids and other current assets 13,017 11,476
Total current assets 253,206 315,590
Intangible assets, net 114,325 64,266
Goodwill 163,805 116,899
Property, plant and equipment, net 56,403 56,616
Deferred tax assets 160,464 162,485
Other assets 4,622 2,165
Total assets 752,825 718,021
Current liabilities:    
Accounts payable 4,874 4,096
Accrued salaries and benefits 8,432 12,278
Deferred revenue 7,317 5,780
Accrued acquisition liability 12,100 0
Other current liabilities 7,392 6,212
Total current liabilities 40,115 28,366
Convertible notes, long-term 121,069 119,418
Long-term imputed financing obligation 38,496 38,625
Long-term income taxes payable 3,110 2,903
Deferred tax liabilities 14,677 0
Other long-term liabilities 637 2,176
Total liabilities $ 218,104 $ 191,488
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 March 31, 2016 and December 31, 2015 $ 0 $ 0
Common stock, $.001 par value: Authorized: 500,000,000 shares Issued and outstanding: 110,077,451 shares at March 31, 2016 and 109,287,591 shares at December 31, 2015 110 109
Additional paid-in capital 1,137,500 1,130,368
Accumulated deficit (602,439) (604,317)
Accumulated other comprehensive income (loss) (450) 373
Total stockholders’ equity 534,721 526,533
Total liabilities and stockholders’ equity $ 752,825 $ 718,021