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Restructuring and Related Activities - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Nov. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 1,729	$ 2,596
Employee Severance And Other Employee Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring liability			$ 321
Leased Facilities Abandoned [Member] | Discounted Lease Related Restructuring Liability [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring liability			2,228
Equipment Abandoned [Member] | Discounted Lease Related Restructuring Liability [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring liability			$ 768

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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.

+ Details

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b)(2))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

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- Details

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- Details

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- Details

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