Organization and Basis of Presentation - Additional Information (Detail)		12 Months Ended
Aug. 06, 2019 shares	Dec. 31, 2019 Segment shares
Consolidation And Basis Of Presentation [Line Items]
Number of reportable business segments \| Segment		1
Legacy Amplify [Member]
Consolidation And Basis Of Presentation [Line Items]
Number of common stock share for each share \| shares	0.933	0.933

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