Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Lease commencement date	Jan. 01, 2017
Lessee operating lease existence of option to extend	true
Lease expiry date	Oct. 31, 2023
Operating lease incremental borrowing rate	10.00%	10.00%
Cash paid for the operating lease liability	$ 39,000	$ 137,000
Remaining lease term	9 months 29 days	29 days
Future minimum facility lease payments due in 2022		$ 134,000
General and administrative expense [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Short-term lease expense	$ 112,000
Operating lease expense	38,000	138,000
Rent expense	$ 38,000	$ 138,000