Basis of Presentation (Details)	Jun. 30, 2020 item
Basis of Presentation and Summary of Significant Accounting Policies
Number of art fairs postponed or cancelled	7
Number of remaining art fairs that may need to be cancelled	8

Number of art fairs that may need to be cancelled, that have not yet been postponed or cancelled due to COVID-19 pandemic.

No definition available.

Name:	leaf_NumberOfArtFairsPotentialCancellations
Namespace Prefix:	leaf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant