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Subsequent Event (Details) - Subsequent Event $ in Millions | Jan. 20, 2025 USD ($) item
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Subsequent Event [Line Items] |
Number of pilot stations | item | 55
Accelerated depreciation expense | $ | $ 55.0

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- Definition Amount of depreciation expense to be recognized in future periods due to change in the life of depreciable assets. + References No definition available. + Details
Name: | clne_AcceleratedDepreciationExpense
Namespace Prefix: | clne_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Number of pilot stations where the assets including, but not limited to station equipment and site improvements related to the company are installed. + References No definition available. + Details
Name: | clne_NumberOfPilotStations
Namespace Prefix: | clne_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |