Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Balance Sheet Components [Abstract]
Accrued Research And Development	$ 4,498,000	$ 1,575,000
Accrued General and Administrative	646,000	996,000
Accrued payroll and employee benefits	533,000	1,132,000
Operating lease liability	27,000	0
Total accrued liabilities	$ 5,704,000	$ 3,703,000