v3.25.4

4. BITCOIN - Schedule of Activities of the Bitcoin (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Common Domain Members [Abstract] |  |  |
Beginning Balance - before cumulative effect change |  | $ 1,189,443 | $ 431,661
Addition of bitcoin from mining activities | [1] | 181,180 | 162,306
Bitcoin purchased |  | 31 | 0
Bitcoin sold |  | (28,177) | 0
Bitcoin issued for services and other non-cash consideration |  | (712) | (3,413)
Bitcoin transferred to collateral account |  | (524,299) | (8,860)
Bitcoin received from collateral account |  | 431,363 | 129,180
(Loss) gain on fair value of bitcoin, net |  | (246,832) | 218,206
Ending Balance | [2] | $ 1,001,997 | $ 929,080
[1] | Net of mining pool fees.
[2] | Includes Bitcoin - current of $830,073 and Bitcoin - noncurrent of $171,924 as presented within Condensed Consolidated Balance Sheets as of December 31, 2025.

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 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 purchased + References No definition available. + Details
Name: | clsk_BitcoinPurchased
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 Sold + References No definition available. + Details
Name: | clsk_BitcoinSold
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 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