Leases - Schedule of Lease-related Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets:
Operating lease assets	$ 1,190	$ 24
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Operating lease assets	Operating lease assets
Finance lease assets	$ 218
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Finance lease assets	Finance lease assets
Total lease assets	$ 1,408	$ 24
Current
Operating lease liabilities	$ 171	$ 25
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Operating lease liabilities	Operating lease liabilities
Finance lease liabilities	$ 121
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Finance lease liabilities	Finance lease liabilities
Non-current
Operating lease liabilities	$ 1,051	$ 2
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Operating lease liabilities	Operating lease liabilities
Finance lease liabilities	$ 62
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Finance lease liabilities	Finance lease liabilities
Total lease liabilities	$ 1,405	$ 27