| Cover - USD ($) | 12 Months Ended | ||
| Aug. 31, 2020 | Nov. 06, 2020 | Feb. 28, 2019 | |
| Cover [Abstract] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Period End Date | Aug. 31, 2020 | ||
| Document Transition Report | false | ||
| Entity File Number | 000-55418 | ||
| Entity Registrant Name | KUSHCO HOLDINGS, INC. | ||
| Entity Incorporation, State or Country Code | NV | ||
| Entity Tax Identification Number | 46-5268202 | ||
| Entity Address, Address Line One | 6261 Katella Avenue | ||
| Entity Address, Address Line Two | Suite 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 | 462-4603 | ||
| Title of 12(g) Security | Common Stock, par value $0.001 per share | ||
| No Trading Symbol Flag | true | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | No | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Accelerated Filer | ||
| Entity Small Business | true | ||
| Entity Emerging Growth Company | true | ||
| Entity Ex Transition Period | true | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 106,251,554 | ||
| Entity Common Stock, Shares Outstanding | 127,274,667 | ||
| Entity Central Index Key | 0001604627 | ||
| Current Fiscal Year End Date | --08-31 | ||
| Amendment Flag | false | ||
| Document Fiscal Year Focus | 2020 | ||
| Document Fiscal Period Focus | FY |
