Leases - Additional Information (Detail) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2023 USD ($) ft²	Aug. 31, 2023 USD ($) ft²	Sep. 30, 2023 USD ($) ft²	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) ft²	Sep. 30, 2022 USD ($)
Square feet of office space | ft²	11,495	39,875	96,000		96,000
Average initial lease term			4 years 9 months 18 days		4 years 9 months 18 days
Discount rate			4.90%		4.90%
Operating leases, rent expense, net			$ 0.4	$ 0.4	$ 1.2	$ 1.3
Total lease payments			0.4	0.4	1.2	1.3
Lease obligation incurred			$ 1.7	$ 0.0	$ 1.7	$ 0.5
Operating lease payment to be made	$ 1.3	$ 1.9
Lessee, operating lease, option to extend	September 29, 2029	August 30, 2027
Minimum [Member]
Lease term range					1 year
Maximum [Member]
Lease term range					3 years 10 months 24 days
Weighted Average [Member]
Lease term range					3 years 6 months