Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating expenses
Research and development	$ 7,188	$ 4,520	$ 16,764	$ 11,236
General and administrative	2,891	1,488	7,987	3,489
Total operating expenses	10,079	6,008	24,751	14,725
Loss from operations	(10,079)	(6,008)	(24,751)	(14,725)
Interest and other expense, net	(9)	(111)	(4)	(93)
Change in fair value of earnout liability	6,226		6,226
Change in fair value of derivative liability		(4,706)	(3,501)	(6,864)
Change in fair value of common stock warrant liability	450		450
Total other income (expense), net	6,667	(4,817)	3,171	(6,957)
Net loss and comprehensive loss	$ (3,412)	$ (10,825)	$ (21,580)	$ (21,682)
Net loss per share attributable to common stockholders, basic and diluted (in Dollars per share)	$ (0.69)	$ (6.14)	$ (7.13)	$ (12.81)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in Shares)	4,966,226	1,762,700	3,028,277	1,692,427