Supplemental Information - Summary of Certain Statements of Operations Amounts (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	$ 1,035	$ 1,236	$ 2,890	$ 865
Interest expense	(57)	(356)	(73)	(1,075)
Interest income	31	0	44	16
Common stock warrants - financing costs amortization	(21)	0	(51)	0
Total	(47)	(356)	(80)	(1,059)
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	210	252	620	1,061
Selling, General, and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expenses	$ 825	$ 984	$ 2,270	$ (196)

Common warrants financing costs.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net amount of nonoperating interest income (expense).

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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