Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Mar. 09, 2022
Jun. 30, 2021
Cover [Abstract]        
Document Type 10-K      
Amendment Flag false      
Document Annual Report true      
Document Transition Report false      
Document Period End Date Dec. 31, 2021      
Document Fiscal Period Focus FY      
Document Fiscal Year Focus 2021      
Current Fiscal Year End Date --12-31      
Entity File Number 001-36555      
Entity Registrant Name MARATHON DIGITAL HOLDINGS, INC.      
Entity Central Index Key 0001507605      
Entity Tax Identification Number 01-0949984      
Entity Incorporation, State or Country Code NV      
Entity Address, Address Line One 1180 North Town Center Drive      
Entity Address, Address Line Two Suite 100      
Entity Address, City or Town Las Vegas      
Entity Address, State or Province NV      
Entity Address, Postal Zip Code 89144      
City Area Code 702      
Local Phone Number 945-2773      
Title of 12(b) Security Common Stock      
Trading Symbol MARA      
Security Exchange Name 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      
Entity Shell Company false      
Entity Public Float       $ 3.1
Entity Common Stock, Shares Outstanding     103,052,069  
ICFR Auditor Attestation Flag true      
Auditor Firm ID 688      
Auditor Name Marcum LLP RBSM LLP    
Auditor Location Costa Mesa, CA Las Vegas, NV