Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Mar. 30, 2021
Jun. 30, 2020
Document and Entity Information [Abstract]      
Entity Central Index Key 0001167419    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2020    
Entity File Number 001-33675    
Entity Registrant Name RIOT BLOCKCHAIN, INC.    
Entity Incorporation State Country Code NV    
Entity Tax Identification Number 84-1553387    
Entity Address, Address Line One 202 6th Street    
Entity Address, Address Line Two Suite 401    
Entity Address, City or Town Castle Rock    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80104    
City Area Code 303    
Local Phone Number 794-2000    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Auditor Attestation Flag true    
Title of 12(b) Security Common Stock no par value per share    
Trading Symbol RIOT    
Name of Exchange on which Security is Registered NASDAQ    
Entity Common Stock, Shares Outstanding   84,120,723  
Entity Public Float     $ 77.7