Cover
| Cover | Apr. 22, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | LEXARIA BIOSCIENCE CORP. |
| Entity Central Index Key | 0001348362 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Document Period End Date | Apr. 22, 2022 |
| Entity Incorporation State Country Code | NV |
| Entity Tax Identification Number | 20-2000871 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity File Number | 000-52138 |
| Entity Address Address Line 1 | 100 – 740 McCurdy Road |
| Entity Address City Or Town | Kelowna |
| Entity Address State Or Province | BC |
| Entity Address Country | CA |
| Entity Address Postal Zip Code | V1X 2P7 |
| City Area Code | 250 |
| Local Phone Number | 765-6424 |
| Security 12b Title | Common Stock, par value $0.001 per share |
| Trading Symbol | LEXX |
| Security Exchange Name | NASDAQ |