Commitments and Contingencies - Schedule of Other Information related to Stamford Lease and New Stamford Lease (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Commitments and Contingencies
Operating cash outflows relating to operating leases	$ 494	$ 485
ROU assets obtained in exchange for new operating lease liabilities
Remaining lease term - operating leases (years)	9 months 18 days	1 year 9 months 18 days
Discount rate - operating leases	7.00%	7.00%

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

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

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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