CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and Cash Equivalents	$ 14,626	$ 24,897
Marketable Securities	121,962	59,065
Accounts and Other Receivables	890	44
Prepaid and Other Current Assets	2,468	1,108
Total Current Assets	139,946	85,114
Property and Equipment, Net	8,814	7,205
Intangible Assets, Net	23,073	23,833
Other Assets	157	424
Goodwill	8,965	8,965
Total Assets	180,955	125,541
Current Liabilities:
Accounts Payable	1,982	745
Accrued Expenses	13,807	10,960
Current Portion of Long-Term Liabilities	1,006	388
Current Portion of Term Loan		5,592
Total Current Liabilities	16,795	17,685
Term Loan, less Current Portion		5,746
Other Long-Term Liabilities	7,415	6,336
Total Liabilities	24,210	29,767
Commitments and Contingent Liabilities (Note 13)
Stockholders' Equity:
Convertible Preferred Stock, $.01 Par Value; 3,000,000 Shares Authorized; No Shares Issued and Outstanding at September 30, 2013 and December 31, 2012
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 81,108,109 and 64,359,513 Shares Issued and Outstanding at September 30, 2013 and December 31, 2012, respectively	81	64
Additional Paid-In Capital	477,595	357,094
Accumulated Other Comprehensive Income	2,686	2,745
Accumulated Deficit	(323,617)	(264,129)
Total Stockholders' Equity	156,745	95,774
Total Liabilities and Stockholders' Equity	$ 180,955	$ 125,541