CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and Cash Equivalents	$ 24,897	$ 11,899
Marketable Securities	59,065	41,413
Accounts and Other Receivables	44	170
Prepaid and Other Current Assets	1,108	1,202
Total Current Asset	85,114	54,684
Property and Equipment, Net	7,205	9,093
Intangible Assets, Net	23,833	24,923
Other Assets	424	329
Goodwill	8,965	8,965
Total Assets	125,541	97,994
Current Liabilities:
Accounts Payable	745	935
Accrued Expenses	10,960	7,008
Current Portion of Long-Term Liabilities	388	219
Current Portion of Term Loan	5,592	6,136
Total Current Liabilities	17,685	14,298
Term Loan, less Current Portion	5,746	9,008
Other Long-Term Liabilities	6,336	5,966
Total Liabilities	29,767	29,272
Commitments and Contingent Liabilities (Notes 13 and 15)
Stockholders' Equity:
Convertible Preferred Stock, $.01 Par Value; 3,000,000 Shares Authorized; No Shares Issued and Outstanding at December 31, 2012 and 2011
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 64,359,513 and 44,210,636 Shares Issued and Outstanding at December 31, 2012 and 2011, respectively	64	44
Additional Paid-In Capital	357,094	271,032
Accumulated Other Comprehensive Income	2,745	2,652
Accumulated Deficit	(264,129)	(205,006)
Total Stockholders' Equity	95,774	68,722
Total Liabilities and Stockholders' Equity	$ 125,541	$ 97,994