Stock-Based Compensation Expense - Additional Information (Detail) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock under Employee Stock Purchase Plan	$ 740,000	$ 390,000
Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock under Employee Stock Purchase Plan	$ 2,000	$ 3,000
Issuance of common stock under Employee Stock Purchase Plan (in shares)	233,401	292,981
Employee Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock available for issuance	900,000
Employees Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock under Employee Stock Purchase Plan	$ 25,000
Issuance of common stock under Employee Stock Purchase Plan (in shares)	5,000
Employees Awards \| Employee Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Discount on purchase price percentage of fair market value	85.00%
Options and PNQs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense related to options	$ 1,500,000
Unrecognized compensation expense, weighted average period for recognition	1 year 2 months 12 days
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense, weighted average period for recognition	2 years 10 months 9 days
Unrecognized compensation expense related to non-option	$ 9,400,000
Market RSU's
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense, weighted average period for recognition	1 year 10 months 2 days
Unrecognized compensation expense related to non-option	$ 8,600,000

Discount on purchase price percentage of fair market value.

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Aggregate number of common shares reserved for future issuance.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

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