Organization and Basis of Presentation - Additional Information (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2020 segment	Sep. 30, 2020 u_eriRegionorSegment	Apr. 11, 2020
Organization and Basis of Presentation
Number of geographic regions		3
Number of reportable segments	3	3
Percentage of furloughed employees			90.00%

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration