| Document and Entity Information | Jul. 28, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 28, 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 | Suite 1900 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10065 |
| City Area Code | 844 |
| Local Phone Number | 845-7291 |
| 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 |
| Security 12b Title | Class 2 Common Stock, $0.0001 parvalue per share |
| Trading Symbol | TLRY |
| Security Exchange Name | NASDAQ |
