IPR&D and Goodwill - Additional Information (Detail)	12 Months Ended
Dec. 31, 2021 USD ($) reportingUnit	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Acquired Indefinite-lived Intangible Assets [Line Items]
Impairment of acquired IPR&D (note 6)	$ 0	$ 0	$ 768,000
Goodwill, impairment loss	$ 0
Number of reporting units \| reportingUnit	1

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.

No definition available.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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-Publisher FASB
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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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-Topic 350
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-Section 50
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- Definition

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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