| Cover | Apr. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 30, 2021 |
| Entity File Number | 001-38875 |
| Entity Registrant Name | GREENLANE HOLDINGS, INC. |
| Entity Central Index Key | 0001743745 |
| Entity Tax Identification Number | 83-0806637 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1095 Broken Sound Parkway |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | Boca Raton |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33487 |
| City Area Code | 877 |
| Local Phone Number | 292-7660 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.01 par value per share |
| Trading Symbol | GNLN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | true |
