CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and Cash Equivalents	$ 43,894	$ 40,288
Marketable Securities	70,115	99,139
Accounts and Other Receivables	3,423	1,880
Prepaid and Other Current Assets	2,848	3,449
Total Current Assets	120,280	144,756
Property and Equipment, Net	7,478	10,372
Intangible Assets, Net	48,690	67,591
Other Assets	1,929	1,929
Goodwill		90,976
Total Assets	178,377	315,624
Current Liabilities:
Accounts Payable	2,942	1,715
Accrued Expenses	12,256	19,455
Current Portion of Long-Term Liabilities	4,784	6,566
Total Current Liabilities	19,982	27,736
Other Long-Term Liabilities	30,348	51,519
Total Liabilities	50,330	79,255
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, 2018 and December 31, 2017
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 156,645,863 and 138,520,404 Shares Issued and Outstanding at June 30, 2018 and December 31, 2017, Respectively	157	139
Additional Paid-In Capital	1,071,092	1,046,183
Accumulated Other Comprehensive Income	2,590	2,564
Accumulated Deficit	(945,792)	(812,517)
Total Stockholders' Equity	128,047	236,369
Total Liabilities and Stockholders' Equity	$ 178,377	$ 315,624