| Document and Entity Information | Aug. 17, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 17, 2021 |
| Entity Registrant Name | Tilray, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38594 |
| Entity Tax Identification Number | 82-4310622 |
| Entity Address, Address Line One | 655 Madison Avenue |
| Entity Address, Address Line Two | 19th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10065 |
| City Area Code | 519 |
| Local Phone Number | 322-8800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001731348 |
| Title of 12(b) Security | Class 2 Common stock, par value $0.0001 per share |
| Trading Symbol | TLRY |
| Security Exchange Name | NASDAQ |
