| Cover - USD ($) | 12 Months Ended | |
| Dec. 31, 2021 | Mar. 25, 2022 | |
| Cover [Abstract] | ||
| Entity Registrant Name | PLANET 13 HOLDINGS INC. | |
| Entity Central Index Key | 0001813452 | |
| Document Type | 10-K | |
| Amendment Flag | false | |
| Entity Voluntary Filers | No | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Well Known Seasoned Issuer | No | |
| Entity Small Business | true | |
| Entity Shell Company | false | |
| Entity Emerging Growth Company | true | |
| Entity Current Reporting Status | No | |
| Document Period End Date | Dec. 31, 2021 | |
| Entity Filer Category | Non-accelerated Filer | |
| Document Fiscal Period Focus | FY | |
| Document Fiscal Year Focus | 2021 | |
| Entity Ex Transition Period | false | |
| Entity Common Stock Shares Outstanding | 220,048,952 | |
| Entity Public Float | $ 339,189,441 | |
| Document Annual Report | true | |
| Document Transition Report | false | |
| Entity File Number | 000-56374 | |
| Entity Tax Identification Number | 83-2787199 | |
| Entity Address Address Line 1 | 2548 West Desert Inn Road | |
| Entity Address Address Line 2 | Suite 100 | |
| Entity Address City Or Town | Las Vegas | |
| Entity Address State Or Province | NV | |
| Entity Address Postal Zip Code | 89109 | |
| City Area Code | 702 | |
| Local Phone Number | 206-1313 | |
| Security 12g Title | Common Shares | |
| Entity Interactive Data Current | No | |
| Auditor Name | DAVIDSON & COMPANY LLP | |
| Auditor Location | Vancouver, Canada | |
| Auditor Firm Id | 731 |
