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

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Percentage of vesting of award under share-based payment arrangement.

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Stock-based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended	9 Months Ended
	May 14, 2019	Sep. 30, 2021	Sep. 30, 2021
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Share-based Payment Arrangement, Expense		$ 0	$ 0
December 31, 2026 [Member]
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Amount remaining to be recognized as expense		$ 276,000	$ 276,000
2019 Equity Incentive Plan [Member]
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Number of shares authorized for issuance	450,000
Vesting rate	20.00%
2019 Equity Incentive Plan [Member] \| Share-based Payment Arrangement, Option [Member]
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Exercise price of options outstanding		$ 10.22	$ 10.22
2019 Equity Incentive Plan [Member] \| Share-based Payment Arrangement, Option [Member] \| Maximum [Member]
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Exercise price of options outstanding		11.78	11.78
2019 Equity Incentive Plan [Member] \| Share-based Payment Arrangement, Option [Member] \| Minimum [Member]
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Exercise price of options outstanding		$ 10.00	$ 10.00