CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and Cash Equivalents	$ 54,735	$ 42,461
Marketable Securities	85,795	147,315
Accounts and Other Receivables	3,013	1,784
Prepaid and Other Current Assets	3,774	4,009
Total Current Assets	147,317	195,569
Property and Equipment, Net	11,308	13,192
Intangible Assets, Net	67,815	81,487
Other Assets	2,002	2,134
Goodwill	90,976	90,976
Total Assets	319,418	383,358
Current Liabilities:
Accounts Payable	1,278	1,740
Accrued Expenses	17,845	28,657
Current Portion of Long-Term Liabilities	5,792	4,826
Total Current Liabilities	24,915	35,223
Other Long-Term Liabilities	75,351	82,704
Total Liabilities	100,266	117,927
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, 2017 and December 31, 2016
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 132,108,478 and 120,516,654 Shares Issued and Outstanding at September 30, 2017 and December 31, 2016, respectively	132	121
Additional Paid-In Capital	1,025,108	982,255
Accumulated Other Comprehensive Income	2,588	2,541
Accumulated Deficit	(808,676)	(719,486)
Total Stockholders' Equity	219,152	265,431
Total Liabilities and Stockholders' Equity	$ 319,418	$ 383,358