Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 29, 2022	Jun. 30, 2021
Entity Listings [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	001-39140
Entity Registrant Name	LEFTERIS ACQUISITION CORP.
Entity Central Index Key	0001822873
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-2646550
Entity Address, Address Line One	292 Newbury Street
Entity Address, Address Line Two	Suite 293
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02115
City Area Code	617
Local Phone Number	510-1991
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	true
Entity Public Float			$ 252,401,828
Auditor Name	WithumSmith+Brown, PC
Auditor Location	New York, New York
Auditor Firm ID	100
Units [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one share of Class A common stock, $0.0001 par value, and one-third of one redeemable warrant
Trading Symbol	LFTRU
Security Exchange Name	NASDAQ
Class A Ordinary Shares [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Shares of Class A common stock included as part of the units
Trading Symbol	LFTR
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		20,709,894
Redeemable Warrants [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50
Trading Symbol	LFTRW
Security Exchange Name	NASDAQ
Class B Ordinary Shares [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		5,177,473