Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended
	May 31, 2022	Sep. 30, 2023	Jan. 01, 2023	Dec. 31, 2022	Jan. 01, 2022
Accounting Policies [Line Items]
Operating lease right-of-use asset, net		$ 1,258		$ 226	$ 200
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]					Other Assets, Noncurrent
Current portion of lease liability		292		180	$ 100
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]					Other Liabilities, Current
Non-current portion of lease liability		1,011		44	$ 100
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]					Other Liabilities, Noncurrent
Carrying Value Of Investment		0		0
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounting Policies [Line Items]
Accumulated Deficit Net Of Tax			$ 500
Lease Agreements [Member]
Accounting Policies [Line Items]
Operating Lease Payment	$ 1,800
2018 Convertible Notes [Member]
Accounting Policies [Line Items]
Carrying amount of convertible promissory note		400		400
Fair value amount of convertible promissory note		$ 4,200		$ 13,100