CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses:
Research and development	$ 6,393	$ 5,898	$ 13,848	$ 9,263
General and administrative	4,319	3,886	9,351	8,490
Total operating expenses	10,712	9,784	23,199	17,753
Loss from operations	(10,712)	(9,784)	(23,199)	(17,753)
Other income (expense):
Realized gain on marketable securities			15
Interest income	349	188	659	188
Interest expense	(172)	(147)	(415)	(150)
Loss on fixed asset disposition		(28)		(28)
Net loss	$ (10,535)	$ (9,771)	$ (22,940)	$ (17,743)
Net loss per common share, basic and diluted	$ (0.34)	$ (0.32)	$ (0.75)	$ (0.72)
Weighted-average number of shares used in computing net loss per common share, basic and diluted	30,701,758	30,588,495	30,674,868	24,778,949
Comprehensive loss:
Net loss	$ (10,535)	$ (9,771)	$ (22,940)	$ (17,743)
Other comprehensive items:
Unrealized loss on marketable securities	(313)	(101)	(879)	(101)
Total other comprehensive loss	(313)	(101)	(879)	(101)
Total comprehensive loss	$ (10,848)	$ (9,872)	$ (23,819)	$ (17,844)