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6. INTANGIBLE ASSETS - Estimated Useful Life (Details)	9 Months Ended
	Jun. 30, 2021
Finite-Lived Intangible Assets [Line Items]
[custom:StrategicContract]	5 years
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	13 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Websites [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:WebsitesUsefulLife]	3 years
Customer List [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:CustomerListAndNonCompeteUsefulLife]	1 year 6 months
Customer List [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:CustomerListAndNonCompeteUsefulLife]	4 years
Design Assets [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:DesignAssetsUsefulLife]	2 years
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:TrademarksUsefulLife]	14 years
Engineering [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:EnginerringTradeSecretsUsefulLife]	1 year
Engineering [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:EnginerringTradeSecretsUsefulLife]	7 years
Software [Member]
Finite-Lived Intangible Assets [Line Items]
[custom:SooftwareUsefulLife]	4 years

X

- References

No definition available.

+ Details

Name:	CLSK_CustomerListAndNonCompeteUsefulLife
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	CLSK_DesignAssetsUsefulLife
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	CLSK_EnginerringTradeSecretsUsefulLife
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	CLSK_SooftwareUsefulLife
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	CLSK_StrategicContract
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	CLSK_TrademarksUsefulLife
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	CLSK_WebsitesUsefulLife
Namespace Prefix:	CLSK_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- 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_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=CLSK_WebsitesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=CLSK_CustomerListMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=CLSK_DesignAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=CLSK_EngineeringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=CLSK_SoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: