Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 12, 2021
Cover [Abstract]    
Entity Central Index Key 0001167419  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
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  
Title of 12(b) Security Common Stock, no par value  
Trading Symbol RIOT  
Name of Exchange on which Security is Registered NASDAQ  
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  
Entity Common Stock, Shares Outstanding   115,938,152