CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 34,684	$ 39,788
Marketable securities	87,780	86,444
Accounts receivable	598	5,189
Income tax receivable	4,394	2,963
Prepaid expenses and other current assets	2,129	2,186
Total current assets	129,585	136,570
Marketable securities, non-current	3,688	1,819
Property, plant and equipment, net	7,371	7,013
Goodwill	46,317	44,794
Other intangible assets, net	86,985	86,198
Other assets	554	554
Total assets	274,500	276,948
Current liabilities:
Accounts payable	6,044	7,529
Accrued compensation	5,122	5,324
Other accrued liabilities	619	613
Deferred acquisition consideration	10,056	17,353
Deferred tax liability	3,458	3,342
Deferred revenue		509
Total current liabilities	25,299	34,670
Warrant liability	188	187
Deferred acquisition consideration, non-current	9,045	11,624
Deferred tax liability, non-current	8,391	9,545
Deferred revenue, non-current		921
Total liabilities	42,923	56,947
Commitments and contingencies
Stockholders' equity:
Preferred stock, $.001 par value; 2,000,000 shares authorized; none outstanding
Common stock, $.001 par value; 150,000,000 shares authorized; 93,104,676 and 93,049,938 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively	93	93
Additional paid in capital	562,182	561,355
Accumulated other comprehensive loss	(168)	(6,677)
Accumulated deficit	(330,530)	(334,770)
Total stockholders' equity	231,577	220,001
Total liabilities and stockholders' equity	$ 274,500	$ 276,948