| Document and Entity Information Document | Dec. 07, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Creation Date | Dec. 7, 2021 |
| Document Period End Date | Dec. 7, 2021 |
| Amendment Flag | false |
| Entity Registrant Name | IntelGenx Technologies Corp. |
| Entity Address, Address Line One | 6420 Abrams |
| Entity Address, City or Town | St- Laurent |
| Entity Address, State or Province | QC |
| Entity Address, Country | CA |
| Entity Address, Postal Zip Code | H4S 1Y2 |
| Entity Incorporation, State Country Name | DE |
| City Area Code | 514 |
| Local Phone Number | 331-7440 |
| Entity File Number | 000-31187 |
| Entity Central Index Key | 0001098880 |
| Entity Emerging Growth Company | false |
| Entity Tax Identification Number | 87-0638336 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(g) Security | Common Stock, $0.00001 par value |
