Balance Sheet Components (Details) - Schedule of prepaid expenses and other current assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Schedule of prepaid expenses and other current assets [Abstract]
Prepaid directors and officers liability insurance premiums	$ 821
Prepaid preclinical services	885
Other	126	4
Total	$ 1,832	$ 4