Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating expenses
Research and development	$ 3,076,000	$ 2,286,000	$ 5,137,000	$ 4,473,000
Acquired in-process research and development				6,767,000
General and administrative	2,082,000	557,000	3,462,000	1,196,000
Total operating expenses	5,158,000	2,843,000	8,599,000	12,436,000
Loss from operations	(5,158,000)	(2,843,000)	(8,599,000)	(12,436,000)
Other income (expense)
Interest income	28,000	58,000	76,000	110,000
Interest expense	(230,000)	(281,000)	(536,000)	(369,000)
Other income (expense)	4,000		4,000
Change in fair value of derivative liabilities	1,157,000	(101,000)	1,117,000	(135,000)
Total other income (expense), net	959,000	(324,000)	661,000	(394,000)
Loss before income taxes	(4,199,000)	(3,167,000)	(7,938,000)	(12,830,000)
Net loss	(4,199,000)	(3,167,000)	(7,938,000)	(12,830,000)
Unrealized gain on investments		7,000		7,000
Comprehensive loss	$ (4,199,000)	$ (3,160,000)	$ (7,938,000)	$ (12,823,000)
Per share information:
Net loss per share, basic	$ (0.56)	$ (0.68)	$ (1.30)	$ (2.76)
Weighted average shares outstanding, basic	7,505,097	4,652,777	6,086,816	4,652,777
Net loss per share, diluted	$ (0.69)	$ (0.68)	$ (1.38)	$ (2.76)
Weighted average shares outstanding, diluted	7,720,977	4,652,777	6,452,413	4,652,777