Document and Entity Information - USD ($)	6 Months Ended
	Dec. 31, 2019	Mar. 30, 2020	Jun. 30, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	MERIDA MERGER CORP. I
Entity Central Index Key	0001785592
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Entity Well-known Seasoned Issue	No
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Ex Transition Period	false
Entity Small Business	true
Entity Current Reporting Status	Yes
Entity Shell Company	true
Entity Emerging Growth Company	true
Entity Common Stock, Shares Outstanding		16,571,552
Entity Public Float			$ 0
Entity File Number	001-39119
Entity Interactive Data Current	Yes
Entity Incorporation State Country Code	DE