COMMITMENTS AND CONTINGENCIES, Underwriting Agreement (Details) - USD ($)	Mar. 31, 2021	Oct. 23, 2020
Underwriting Agreement [Abstract]
Underwriters deferred fee (in dollars per unit)	$ 0.35
Deferred underwriting fees	$ 7,248,463	$ 7,248,463

Amount of costs incurred and deferred for underwriting fees in connection with the offering of Units in Initial Public Offering and Private Placement of Warrants.

No definition available.

Name:	lftr_UnderwritingFeesDeferred
Namespace Prefix:	lftr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant