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v3.22.1

Summary of Restricted Stock Unit Activity (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Options Outstanding |  |  |
Unvested at December 31, 2021 |  | 606,685 |
Awarded |  | 124,139 |
Vested |  | (130,978) |
Forfeited/expired/cancelled |  | (8,469) |
Restricted stock units, outstanding |  | 591,377 | 606,685
Vested and expected to vest at March 31, 2022 | [1] | 574,925 |
Weighted-Average Remaining Contractual Term (in years) |  |  |
Unvested at December 31, 2021 |  | 3 years 1 month 2 days | 3 years 25 days
Vested and expected to vest at March 31, 2022 |  | 2 years 8 months 23 days |
Aggregate Intrinsic Value |  |  |
Unvested at March 31, 2022 |  | $ 111,232 | $ 160,674
Vested and expected to vest at March 31, 2022 | [1] | $ 108,138 |
Restricted Stock Units and Performance Stock Units |  |  |
Options Outstanding |  |  |
Restricted stock units, outstanding |  | 591,377 |
[1] | Represents the number of vested stock units as of March 31, 2022 plus the number of unvested stock units expected to vest as of March 31, 2022 based on the unvested outstanding stock units at March 31, 2022 adjusted for estimated forfeiture rates of 8% for awards granted to non-executive level employees and 3% for awards granted to executive level employees.

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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