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.

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

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Restructuring Costs - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Mar. 31, 2019
2019 French Restructuring Obligation
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 107	$ 248
Corporate Workforce Reduction \| Employee Severance
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated (as a percent)			50.00%
2019 Corporate Restructuring Obligations
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 70	$ 272