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Leases - Summary of Lease Costs As Follows (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement
Operating lease cost	[1]	$ 190	$ 151	$ 519	$ 454
Other Information
Weighted-average remaining lease term (months)		15 months	7 months 15 days	15 months	7 months 15 days
Weighted-average discount rate		7.60%	7.60%	7.60%	7.60%
[1] Operating lease cost is recorded within general and administrative expenses in the accompanying condensed consolidated statements of operations and comprehensive loss.

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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.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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