| Cover | Jan. 11, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 8, 2021 |
| Entity Registrant Name | KUSHCO HOLDINGS, INC. |
| Entity Incorporation, State or Country Code | NV |
| Entity File Number | 000-55418 |
| Entity Tax Identification Number | 46-5268202 |
| Entity Address, Address Line One | 6261 Katella Ave |
| Entity Address, Address Line Two | Ste 250 |
| Entity Address, City or Town | Cypress |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90630 |
| City Area Code | 714 |
| Local Phone Number | 243-4311 |
| 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 | KSHB |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Entity Central Index Key | 0001604627 |
| Amendment Flag | false |
