| Document and Entity Information | Jun. 25, 2021 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Jun. 25, 2021 |
| Entity Registrant Name | Meta Materials Inc. |
| Entity Incorporation, State or Country Code | NV |
| Entity File Number | 001-36247 |
| Entity Tax Identification Number | 74-3237581 |
| Entity Address, Address Line One | 1 Research Drive |
| Entity Address, City or Town | Dartmouth |
| Entity Address, State or Province | NS |
| Entity Address, Country | CA |
| Entity Address, Postal Zip Code | B2Y 4M9 |
| City Area Code | 902 |
| Local Phone Number | 482-5729 |
| Entity Information, Former Legal or Registered Name | Torchlight Energy Resources, Inc. |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | MMAT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001431959 |
| Current Fiscal Year End Date | --12-31 |
| Former Address [Member] | |
| Document And Entity Information [Line Items] | |
| Entity Address, Address Line One | 5700 W. Plano Parkway |
| Entity Address, Address Line Two | Suite 3600 |
| Entity Address, City or Town | Plano |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75093 |
