CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 346,576	$ 338,696
Marketable securities	56,848	48,966
Accounts receivable	7,816	2,251
Prepaids and other current assets	8,766	8,253
Deferred taxes	1,009	205
Total current assets	421,015	398,371
Intangible assets, net	109,260	117,172
Goodwill	116,899	116,899
Property, plant and equipment, net	70,110	72,642
Deferred taxes, long-term	643	4,797
Other assets	3,071	3,498
Total assets	720,998	713,379
Current liabilities:
Accounts payable	5,555	7,001
Accrued salaries and benefits	27,257	33,448
Convertible notes, short-term	168,658	164,047
Other accrued liabilities	8,171	8,346
Total current liabilities	209,641	212,842
Convertible notes, long-term	110,962	109,629
Long-term imputed financing obligation	39,295	39,349
Long-term income taxes payable	1,905	6,561
Other long-term liabilities	7,210	4,769
Total liabilities	369,013	373,150
Commitments and contingencies (Notes 9 and 14)
Stockholders’ equity:
Convertible preferred stock, $.001 par value: Authorized: 5,000,000 shares Issued and outstanding: no shares at March 31, 2014 and December 31, 2013	0	0
Common stock, $.001 par value: Authorized: 500,000,000 shares Issued and outstanding: 113,744,776 shares at March 31, 2014 and 113,459,390 shares at December 31, 2013	114	113
Additional paid-in capital	1,132,092	1,128,148
Accumulated deficit	(779,924)	(787,727)
Accumulated other comprehensive loss	(297)	(305)
Total stockholders’ equity	351,985	340,229
Total liabilities and stockholders’ equity	$ 720,998	$ 713,379