CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and Cash Equivalents	$ 63,025	$ 72,108
Marketable Securities	190,992	217,781
Accounts and Other Receivables	847	970
Prepaid and Other Current Assets	6,091	4,077
Total Current Assets	260,955	294,936
Property and Equipment, Net	11,392	11,461
Intangible Assets, Net	20,541	20,794
Other Assets	78	1,428
Goodwill	8,965	8,965
Total Assets	301,931	337,584
Current Liabilities:
Accounts Payable	2,637	1,506
Accrued Expenses	18,431	24,316
Current Portion of Long-Term Liabilities	4,239	4,418
Total Current Liabilities	25,307	30,240
Other Long-Term Liabilities	16,592	17,239
Total Liabilities	$ 41,899	$ 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 March 31, 2016 and December 31, 2015
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 98,718,484 and 98,685,595 Shares Issued and Outstanding at March 31, 2016 and December 31, 2015, respectively	$ 99	$ 99
Additional Paid-In Capital	882,875	878,655
Accumulated Other Comprehensive Income	2,687	2,307
Accumulated Deficit	(625,629)	(590,956)
Total Stockholders' Equity	260,032	290,105
Total Liabilities and Stockholders' Equity	$ 301,931	$ 337,584