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2. SUMMARY OF SIGNIFICANT ACCOUNTING ACCOUNTING POLICIES - Useful Life of Property and Equipment (Details) | 3 Months Ended
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Dec. 31, 2021
Building [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 30 years
Machinery and Equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 1 year
Machinery and Equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 10 years
Mining Equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 3 years
Mining Equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 15 years
Leasehold Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 5 years
Furniture and Fixtures [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 1 year
Furniture and Fixtures [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 5 years
Infrastructure [Member] |
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment, Useful Life | 15 years

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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
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=clsk_MiningEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=clsk_InfrastructureAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |