Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 21, 2022	Jun. 30, 2021
Entity Listings [Line Items]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39119
Entity Registrant Name	Leafly Holdings, Inc. /DE
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-2266022
Entity Address, Address Line One	113 Cherry Street PMB 88154
Entity Address, City or Town	Seattle
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98104
City Area Code	206
Local Phone Number	455-9504
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	false
Entity Public Float			$ 129.4
Entity Common Stock, Shares Outstanding		40,035,568
Documents Incorporated by Reference	Information pertaining to Part III of this Form 10-K is incorporated by reference to our 2022 definitive proxy statement or, if not filed within 120 days of December 31, 2021, to an amended report on Form 10-K/A filed in the same time period.
Entity Central Index Key	0001785592
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	true
Common Stock, $0.0001 Par Value
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, $0.0001 Par Value
Trading Symbol	LFLY
Security Exchange Name	NASDAQ
Warrants, exercisable for shares of common stock at an exercise price of $11.50 per share
Entity Listings [Line Items]
Title of 12(b) Security	Warrants, exercisable for shares of common stockat an exercise price of $11.50 per share
Trading Symbol	LFLYW
Security Exchange Name	NASDAQ