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Shareholders' Equity (Common Stock Shares Reserved for Issuances) (Detail)	Dec. 31, 2021 shares
Class Of Stock [Line Items]
Shares reserved for issuance	6,988,662
Restricted Stock Units Performance Share Units and Warrants [Member]
Class Of Stock [Line Items]
Shares reserved for issuance	1,933,004
2016 Incentive Award Plan [Member]
Class Of Stock [Line Items]
Shares reserved for issuance	4,066,471
Employee Share Purchase Plan 2020 [Member]
Class Of Stock [Line Items]
Shares reserved for issuance	989,187

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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

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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