v3.25.4

14. REVENUE AND VENDOR CONCENTRATIONS - Digital currency mining segment major suppliers (Details) - Customer Concentration Risk [Member] - Accounts receivable | 3 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Bitmain Technologies |  |
Product Information [Line Items] |  |
Concentration Risk Threshold Percentage | 0.00% | 94.00%
Canaan U.S. Inc |  |
Product Information [Line Items] |  |
Concentration Risk Threshold Percentage | 98.00% | 0.00%

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- Definition Concentration Risk Threshold Percentage + References No definition available. + Details
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Namespace Prefix: | clsk_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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