Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Apr. 20, 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	111 South Jackson Street, Suite 531
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		42,961,994
Entity Central Index Key	0001785592
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	true
Amendment Description	Explanatory NoteForm 10-K(A)On March 31, 2022, Leafly Holdings, Inc. (the “Company”) filed its Annual Report on Form 10-K for the year ended December 31, 2021 (the “Form 10-K”), with the Securities and Exchange Commission (the “SEC”). Because the Company has determined that it will not file its definitive proxy statement within 120 days following the last day of its last fiscal year, the Company is providing Items 10, 11, 12, 13, and 14 of Part III in this Form 10-K/A filing. This Form 10-K/A hereby amends and restates in their entirety the Form 10-K cover page and Items 10 through 14 of Part III.Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this Form 10-K/A also contains new certifications by the principal executive officer and the principal financial officer as required by Section 302 of the Sarbanes-Oxley Act of 2002. Accordingly, Item 15(a)(3) of Part IV is amended to include the currently dated certifications as exhibits. Because no financial statements have been included in this Form 10-K/A and this Form 10-K/A does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4, and 5 of the certifications have been omitted. In addition, Item 15(a)(3) of Part IV is amended to include hyperlinks to certain exhibits incorporated by reference into the Form 10-K that were inadvertently omitted.Except as expressly noted in this Form 10-K/A, this Form 10-K/A does not reflect events occurring after the original filing of the Form 10-K or modify or update in any way any of the other disclosures contained in the Form 10-K including, without limitation, the financial statements. Accordingly, this Form 10-K/A should be read in conjunction with the Company’s Form 10-K and the Company’s other filings with the SEC. Capitalized terms used herein, when not defined, shall have the meaning ascribed in the Company’s Form 10-K.Unless the context otherwise requires, references to “Leafly,” “the Company,” “we,” “us” and “our” in this report refer to Leafly Holdings, Inc. prior to the closing of the Business Combination and to the post-combination company and its consolidated subsidiaries following the Business Combination, and “Merida” refers to the business of Merida Merger Corp. I and related entities prior to the Business Combination.
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