Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income Tax Disclosure [Line Items]
Income tax expense	$ 39	$ 0	$ 39	$ 0
Valuation allowance against net deferred tax assets			full valuation allowance		full valuation allowance
Maximum [Member]
Income Tax Disclosure [Line Items]
Income tax expense	$ 100		$ 100