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13. MAJOR CUSTOMERS AND VENDORS (Additional Information) (Details) - Operator | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Bitcoin [Member] |  |  |  |
Representation of company's revenue, percent | 99.00% | 99.00% | 99.00% | 99.00%
Mining pool operator |  |  |  |
Mining pool operator | 1 | 1 | 1 | 1

X
- Definition Mining pool operator + References No definition available. + Details
Name: | clsk_MiningPoolOperator
Namespace Prefix: | clsk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Representation of company's revenue, percent + References No definition available. + Details
Name: | clsk_RepresentationOfCompanysRevenuePercent
Namespace Prefix: | clsk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=clsk_BitcoinMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=clsk_MiningPoolOperatorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |