Commitments and Contingencies - Additional Information (Detail)			6 Months Ended		12 Months Ended
	Jun. 13, 2024 USD ($) ft²	Feb. 08, 2024 ft²	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Commitments And Contingencies [Line Items]
Operating lease, extension expiration			2025-05
Increase in right of use assets				$ 597,000
Increase in right of use assets					$ 600,000
Operating lease, short-term liability			$ 296,000		$ 273,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]			Operating lease, short-term liability		Operating lease, short-term liability
Long-term operating lease liabilities			$ 0		$ 130,000
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]			Long-term operating lease liabilities		Long-term operating lease liabilities
Increase in lease liability					$ 600,000
Operating lease, weighted average discount rate			8.25%		8.25%
Operating lease remaining term			11 months		17 months
Redwood City, California [Member]
Commitments And Contingencies [Line Items]
Operating lease, description			began in June 2021 and expired in May 2023.
Operating lease beginning date			2021-06
Operating lease, expiration			2023-05
Operating lease, term of contract	5 years	6 months	24 months
Operating lease, expiration date		Oct. 31, 2024
Area of operating lease | ft²	18,026	4,141
Rent payments	$ 57,400
Rent payments annual increase percentage	3.00%