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Leases - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) ft²	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) ft²	Jun. 30, 2022 USD ($)
Square feet of office space | ft²	96,000		96,000
Average initial lease term	4 years 10 months 24 days		4 years 10 months 24 days
Discount rate	3.70%		3.70%
Operating leases, rent expense, net	$ 0.4	$ 0.5	$ 0.8	$ 0.9
Total lease payments	0.4	0.5	0.8	0.9
Lease obligation incurred	$ 0.0	$ 0.0	$ 0.0	$ 0.5
Minimum [Member]
Lease term range			1 year
Maximum [Member]
Lease term range			3 years 9 months 18 days
Weighted Average [Member]
Lease term range			3 years

X

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Area of land held.

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X

- Definition

Amount of increase in lease obligation from new lease.

+ References

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- Definition

Discount rate used by lessee to determine present value of operating lease payments.

+ References

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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X

- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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