CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and Cash Equivalents	$ 31,743	$ 72,108
Marketable Securities	171,505	217,781
Accounts and Other Receivables	1,579	970
Prepaid and Other Current Assets	4,887	4,077
Total Current Assets	209,714	294,936
Property and Equipment, Net	11,355	11,461
Intangible Assets, Net	20,034	20,794
Other Assets	1,879	1,428
Goodwill	8,965	8,965
Total Assets	251,947	337,584
Current Liabilities:
Accounts Payable	1,019	1,506
Accrued Expenses	13,233	24,316
Current Portion of Long-Term Liabilities	4,378	4,418
Total Current Liabilities	18,630	30,240
Other Long-Term Liabilities	16,225	17,239
Total Liabilities	34,855	47,479
Commitments and Contingent Liabilities
Stockholders' Equity:
Convertible Preferred Stock, $.01 Par Value; 3,000,000 Shares Authorized; No Shares Issued and Outstanding at September 30, 2016 and December 31, 2015
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 101,248,821 and 98,685,595 Shares Issued and Outstanding at September 30, 2016 and December 31, 2015, respectively	101	99
Additional Paid-In Capital	901,560	878,655
Accumulated Other Comprehensive Income	2,610	2,307
Accumulated Deficit	(687,179)	(590,956)
Total Stockholders' Equity	217,092	290,105
Total Liabilities and Stockholders' Equity	$ 251,947	$ 337,584