Document and Entity Information - shares	3 Months Ended
	Sep. 30, 2019	Dec. 19, 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-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019
Entity Filer Category	Non-accelerated Filer
Entity Ex Transition Period	false
Entity Small Business	true
Entity Current Reporting Status	No
Entity Shell Company	true
Entity Emerging Growth Company	true
Entity Common Stock, Shares Outstanding		16,571,552
Entity File Number	001-39119
Entity Interactive Data Current	No
Entity Incorporation State Country Code	DE