Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating expenses:
Research and development	$ 8,253	$ 2,290	$ 20,187	$ 6,989
General and administrative	2,316	584	6,032	1,288
Total operating expenses	10,569	2,874	26,219	8,277
Loss from operations	(10,569)	(2,874)	(26,219)	(8,277)
Interest income	711	353	1,618	434
Interest expense				(957)
Change in fair value of derivative liability		0		(206)
Net loss	(9,858)	(2,521)	(24,601)	(9,006)
Other comprehensive income/ (loss):
Unrealized gain / (loss) on available for sales securities	16	(16)	145	(16)
Total comprehensive income/(loss)	$ (9,842)	$ (2,537)	$ (24,456)	$ (9,022)
Net loss per share - basic and diluted	$ (0.37)	$ (0.75)	$ (1.59)	$ (2.68)
Weighted average shares of common stock outstanding - basic and diluted	26,841,149	3,361,029	15,489,216	3,360,683