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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 08, 2022
Jun. 30, 2021
Cover [Abstract]      
Entity Central Index Key 0001167419    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Document Transition Report false    
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 3855 Ambrosia Street    
Entity Address, Address Line Two Suite 301    
Entity Address, City or Town Castle Rock    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80109    
City Area Code 303    
Local Phone Number 794-2000    
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 Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Auditor Attestation Flag true    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   117,273,760  
Entity Public Float     $ 3,100.0
DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement to be delivered to stockholders and filed with the Securities and Exchange Commission in connection with the registrant’s Annual Stockholders’ Meeting to be held in 2022 are incorporated by reference into Part III of this Annual Report on Form 10-K. Only those portions of the definitive proxy statement that are specifically incorporated by reference herein shall constitute a part of this Annual Report on Form 10-K.

   
Auditor Name Marcum LLP    
Auditor Location Los Angeles, CA    
Auditor Firm Id 688