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Cover - shares
 3 Months Ended 9 Months Ended
Dec. 31, 2020
Jun. 30, 2021
Aug. 13, 2021
Cover [Abstract]      
Document Type   10-Q  
Amendment Flag   false  
Document Quarterly Report   true  
Document Transition Report   false  
Document Period End Date   Jun. 30, 2021  
Document Fiscal Period Focus   Q3  
Document Fiscal Year Focus   2021  
Current Fiscal Year End Date   --09-30  
Entity File Number   001-39187  
Entity Registrant Name   CleanSpark, Inc.  
Entity Central Index Key   0000827876  
Entity Tax Identification Number   87-0449945  
Entity Incorporation, State or Country Code   NV  
Entity Address, Address Line One   1185 S. 1800 W.  
Entity Address, Address Line Two   Suite 3  
Entity Address, City or Town   Woods Cross  
Entity Address, State or Province   UT  
Entity Address, Postal Zip Code   84087  
City Area Code   (702)  
Local Phone Number   941-8047  
Title of 12(b) Security   Common Stock, par value $0.001 per share  
Trading Symbol   CLSK  
Security Exchange Name   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     35,591,268