Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue - License Fee:		$ 18,000
Operating expenses:
Research and development	25,680	41,564
General and administrative	14,881	15,252
Total operating expenses	40,561	56,816
Loss from operations	(40,561)	(38,816)
Interest and other income (expenses):
(Loss) gain from foreign exchange	26	(18)
Interest income, net	1,259	412
Interest and other income, net	1,285	394
Net loss	$ (39,276)	$ (38,422)
Net income (loss) per common share, basic	$ (0.98)	$ (1.02)
Net income (loss) per common share, diluted	$ (0.98)	$ (1.02)
Weighted average shares used to compute net loss (income) per share, basic	40,254,890	37,558,464
Weighted average shares used to compute net loss (income) per share, fully diluted	40,254,890	37,558,464
Net income (loss)	$ (39,276)	$ (38,422)
Unrealized gain on available-for-sale securities	168	(235)
Comprehensive loss	$ (39,108)	$ (38,657)