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5. BITCOIN - Schedule of activities Of The Bitcoin (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Common Domain Members [Abstract] |  |
Balance at beginning of Fiscal Year | $ 11,147 | $ 23,603
Addition of bitcoin | 168,121 | 131,000
Carrying amount of bicoin sold | (114,915) | (130,635)
Bitcoin issued for services | (720) | (611)
Bitcoin issued for software | (229) | 0
Impairment Loss | (7,163) | (12,210)
Balance at end of Fiscal Year | $ 56,241 | $ 11,147

X
- Definition Addition of bitcoin + References No definition available. + Details
Name: | clsk_AdditionOfBitcoin
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Bitcoin issued for services + References No definition available. + Details
Name: | clsk_BitcoinIssuedForServices
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Bitcoin issued for software + References No definition available. + Details
Name: | clsk_BitcoinIssuedForSoftware
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Bitcoin's Value + References No definition available. + Details
Name: | clsk_BitcoinsValue
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount of bicoin sold + References No definition available. + Details
Name: | clsk_CarryingAmountOfBicoinSold
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Impairment Loss + References No definition available. + Details
Name: | clsk_ImpairmentLoss
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | srt_CommonDomainMembersAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration