CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and Cash Equivalents	$ 66,791	$ 28,020
Marketable Securities	237,819	173,023
Accounts and Other Receivables	527	427
Prepaid and Other Current Assets	4,119	3,515
Total Current Assets	309,256	204,985
Property and Equipment, Net	11,864	10,535
Intangible Assets, Net	21,047	21,807
Other Assets	1,500	1,722
Goodwill	8,965	8,965
Total Assets	352,632	248,014
Current Liabilities:
Accounts Payable	1,217	2,603
Accrued Expenses	19,623	19,296
Current Portion of Long-Term Liabilities	2,795	2,592
Total Current Liabilities	23,635	24,491
Other Long-Term Liabilities	10,370	11,863
Total Liabilities	$ 34,005	$ 36,354
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, 2015 and December 31, 2014
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 98,645,692 and 89,592,779 Shares Issued and Outstanding at September 30, 2015 and December 31, 2014, respectively	$ 99	$ 90
Additional Paid-In Capital	874,240	672,739
Accumulated Other Comprehensive Income	2,560	2,590
Accumulated Deficit	(558,272)	(463,759)
Total Stockholders' Equity	318,627	211,660
Total Liabilities and Stockholders' Equity	$ 352,632	$ 248,014