Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Apr. 20, 2020
Jun. 28, 2019
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 001-38875    
Entity Registrant Name Greenlane Holdings, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 83-0806637    
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    
Title of 12(b) Security Class A Common Stock, $0.01 par value per share    
Trading Symbol GNLN    
Security Exchange Name NASDAQ    
Entity Current Reporting Status No    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period true    
Entity Shell Company false    
Amendment Flag false    
Entity Central Index Key 0001743745    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
Current Fiscal Year End Date --12-31    
Entity Voluntary Filers No    
Entity Public Float     $ 95.0
Entity Well-known Seasoned Issuer No    
Document Annual Report true    
Documents Incorporated by Reference Portions of the registrant's Proxy Statement for the 2020 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant's fiscal year ended December 31, 2019.    
Class A common stock      
Entity Common Stock, Shares Outstanding   10,347,026  
Class B common stock      
Entity Common Stock, Shares Outstanding   5,814,630  
Class C common stock      
Entity Common Stock, Shares Outstanding   77,791,218