Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Research and development services	$ 2,836	$ 1,294
General and administrative services	180	160
Compensation expense	2,977	2,445
Other	54	38
Accrued and other current liabilities	$ 6,047	$ 3,937

Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

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