| Document and Entity Information | Apr. 15, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Apr. 15, 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 | 1100 Maughan Rd |
| Entity Address, City or Town | Nanaimo |
| Entity Address, State or Province | BC |
| Entity Address, Country | CA |
| Entity Address, Postal Zip Code | V9X 1J2 |
| City Area Code | 844 |
| Local Phone Number | 845-7291 |
| Written Communications | false |
| Soliciting Material | true |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class 2 Common Stock, $0.0001 par value per share |
| Trading Symbol | TLRY |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Current Fiscal Year End Date | --12-31 |
| Amendment Flag | false |
| Entity Central Index Key | 0001731348 |
