Discount on purchase price percentage of fair market value.

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

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

+ References

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

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

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- Definition

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

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Stock-Based Compensation Expense - Additional Information (Detail) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Issuance of common stock under Employee Stock Purchase Plan	$ 700,000	$ 390,000	$ 366,000	$ 318,000
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	$ 3,000	$ 3,000
Issuance of common stock under Employee Stock Purchase Plan (in shares)	234,000	293,000	293,000	334,000	527,049	626,818
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock available for issuance	1,100,000				1,100,000
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 \| ESPP
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	$ 300,000				$ 300,000
Unrecognized compensation expense, weighted average period for recognition					1 year 8 months 19 days
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense, weighted average period for recognition					3 years 2 months 8 days
Unrecognized compensation expense related to non-option	11,600,000				$ 11,600,000
Market RSU's
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense, weighted average period for recognition					2 years 3 months 21 days
Unrecognized compensation expense related to non-option	$ 11,200,000				$ 11,200,000