Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
License revenue
Expenses:
Research and development	5,834	656,266
General and administrative	1,731,718	2,463,559
Loss before other income (expense)	1,737,552	3,119,825
Loss before other income (expense)	(1,737,552)	(3,119,825)
Other:
Interest income	88,310	82,934
Interest expense		(692,787)
Other (expense) income, net	(17,290)	562
Gain on warrant derivative liabilities		453,412
Net loss from continuing operations	(1,666,532)	(3,275,704)
Gain (loss) from discontinued operations (Note 5)	240,544	(799,870)
Net loss	$ (1,425,988)	$ (4,075,574)
Basic and diluted loss per share
Continuing operations	$ (0.05)	$ (0.12)
Discontinued operations	0.01	(0.03)
Total basic and diluted loss per share	$ (0.04)	$ (0.15)
Basic and diluted weighted-average shares outstanding	33,249,904	27,391,506