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Subsequent Events (Details) - Subsequent Event [Member] | Jul. 23, 2024 USD ($) shares
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Subsequent Events (Details) [Line Items] |
Promissory notes of lender | $ | $ 250,000
Common Stock [Member] |
Subsequent Events (Details) [Line Items] |
Exchange of common stock | shares | 249,500

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- References No definition available. + Details
Name: | creg_LenderPromissoryNotes
Namespace Prefix: | creg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Number of excess stock shares of an entity that have been sold or granted to shareholders. + References No definition available. + Details
Name: | us-gaap_ExcessStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |