Equity - Additional Information - 2019 Equity Incentive Plan (Detail)	12 Months Ended
	Dec. 31, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized for issuance	1,279,315
Options to Purchase Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares eligible under share based compensation plan by individual within a year	15,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares eligible under share based compensation plan by individual within a year	20,000
Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares eligible under share based compensation plan by individual within a year	20,000
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares eligible under share based compensation plan by individual within a year	10,000