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4. BITCOIN - Schedule of Activities of the Bitcoin (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Common Domain Members [Abstract] |  |  |
Beginning Balance - before cumulative effect change |  | $ 431,661 | $ 56,241
Cumulative effect of the adoption of ASC 350-60 |  | 0 | 4,183
Adjusted beginning balance after cumulative effect change |  | 431,661 | 60,424
Addition of bitcoin from mining activities | [1] | 162,306 | 73,786
Bitcoin sold & issued for services and purchase of software |  | (3,413) | (43,300)
Bitcoin transferred to collateral account |  | (8,860) | 0
Bitcoin received from collateral account |  | 129,180 | 0
Gain on fair value of bitcoin |  | 218,206 | 36,041
Ending Balance |  | $ 929,080 | $ 126,951
[1] | (1) Net of mining pool fees.

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

X
- Definition Adjusted beginning balance fair value of Bitcoin + References No definition available. + Details
Name: | clsk_AdjustedBeginningBalanceFairValueOfBitcoin
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 received from collateral account + References No definition available. + Details
Name: | clsk_BitcoinReceivedFromCollateralAccount
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Bitcoin Transferred To From Collateral + References No definition available. + Details
Name: | clsk_BitcoinTransferredToFromCollateral
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 Cumulative effect change in fair value of Bitcoin + References No definition available. + Details
Name: | clsk_CumulativeEffectChangeInFairValueOfBitcoin
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gains from fair value adjustments of Bitcoin + References No definition available. + Details
Name: | clsk_GainsFromFairValueAdjustmentsOfBitcoin
Namespace Prefix: | clsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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