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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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Stock-based Compensation - Additional Information (Detail) - USD ($)		12 Months Ended
	May 14, 2019	Dec. 31, 2021	Dec. 31, 2020
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Stock-based compensation expense recognized		$ 25,000
Stock option remaining unrecognized amount		218,000
December 31, 2026 [Member]
Disclosure Of Compensation Related Costs Share based Payments [Line Items]
Amount remaining to be recognized as expense		$ 218,000
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		$ 10.46
Stock-based compensation expense recognized		$ 0	$ 0
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		$ 14.50
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