Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 09, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Trading Symbol	TLRY
Entity Registrant Name	Tilray, Inc.
Entity Central Index Key	0001731348
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		133,526,319
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-38594
Entity Tax Identification Number	82-4310622
Entity Address, Address Line One	1100 Maughan Road
Entity Address, City or Town	Nanaimo
Entity Address, State or Province	BC
Entity Address, Country	CA
Entity Address, Postal Zip Code	V9X IJ2
City Area Code	844
Local Phone Number	845-7291
Entity Interactive Data Current	Yes
Title of 12(b) Security	Class 2 Common Stock, $0.0001 par value per share
Security Exchange Name	NASDAQ
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false