CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and Cash Equivalents	$ 68,027	$ 11,232
Marketable Securities	138,888	53,151
Accounts and Other Receivables	329	1,015
Prepaid and Other Current Assets	1,748	1,300
Total Current Assets	208,992	66,698
Property and Equipment, Net	4,044	4,031
Operating Lease Right-of-Use Assets, Net	3,134	3,473
Intangible Assets, Net	45,190	48,690
Other Assets	41	41
Total Assets	261,401	122,933
Current Liabilities:
Accounts Payable	950	1,174
Accrued Expenses	6,467	6,499
Current Portion of Operating Lease Liabilities	1,320	1,944
Current Portion of Other Long-Term Liabilities	2,104	2,026
Total Current Liabilities	10,841	11,643
Long-Term Portion of Operating Lease Liabilities	1,720	1,713
Other Long-Term Liabilities	10,396	15,551
Total Liabilities	22,957	28,907
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, 2020 and December 31, 2019
Common Stock, $.001 Par Value; 297,000,000 Shares Authorized; 39,093,868 and 16,972,077 Shares Issued and Outstanding at June 30, 2020 and December 31, 2019, Respectively	39	17
Additional Paid-In Capital	1,272,783	1,104,706
Accumulated Other Comprehensive Income	2,594	2,619
Accumulated Deficit	(1,036,972)	(1,013,316)
Total Stockholders' Equity	238,444	94,026
Total Liabilities and Stockholders' Equity	$ 261,401	$ 122,933