Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating expenses:
Research and development	$ 5,289	$ 4,197
General and administrative	2,753	2,137
Total operating expenses	8,042	6,334
Loss from operations	(8,042)	(6,334)
Other income (expense):
Interest and investment income	167	226
Other (expense) income, net	(77)	70
Total other income, net	90	296
Net loss	$ (7,952)	$ (6,038)
Net loss per share - basic and diluted (in dollars per share)	$ (0.50)	$ (0.62)
Weighted-average common shares outstanding used in net loss per share - basic and diluted (in shares)	15,898,664	9,686,224