CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and Cash Equivalents	$ 40,797	$ 169,402
Marketable Securities	211,572	133,581
Accounts and Other Receivables	525	489
Prepaid and Other Current Assets	2,703	1,717
Total Current Assets	255,597	305,189
Property and Equipment, Net	10,601	9,973
Intangible Assets, Net	22,313	22,820
Other Assets	116	148
Goodwill	8,965	8,965
Total Assets	297,592	347,095
Current Liabilities:
Accounts Payable	1,187	2,243
Accrued Expenses	17,897	17,179
Current Portion of Long-Term Liabilities	2,118	928
Total Current Liabilities	21,202	20,350
Other Long-Term Liabilities	11,075	6,950
Total Liabilities	32,277	27,300
Commitments and Contingent Liabilities
Stockholders' Equity:
Convertible Preferred Stock, $.01 Par Value; 3,000,000 Shares Authorized; No Shares Issued and Outstanding at June 30, 2014 and December 31, 2013
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 89,396,160 and 89,246,832 Shares Issued and Outstanding at June 30, 2014 and December 31, 2013, respectively	89	89
Additional Paid-In Capital	666,334	662,717
Accumulated Other Comprehensive Income	2,748	2,668
Accumulated Deficit	(403,856)	(345,679)
Total Stockholders' Equity	265,315	319,795
Total Liabilities and Stockholders' Equity	$ 297,592	$ 347,095