Leases - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Operating Lease, Liability, Noncurrent	$ 44	$ 296
Lessee, Operating Lease, Discount Rate	5.30%
Right-of-use lease assets	$ 296	530
Operating lease, liability	$ 302	$ 534
Laboratory Space [Member]
Lessee Lease Description [Line Items]
Operating lease, term of contract	1 month 6 days