Name:	checu_InitialBusinessCombinationSalesDays
Namespace Prefix:	checu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of units issued during period.

No definition available.

Name:	checu_UnitsIssuedDuringPeriodNewIssues
Namespace Prefix:	checu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

No definition available.

Name:	us-gaap_SaleOfStockPricePerShare
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Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

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.

No definition available.

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Data Type:	xbrli:stringItemType
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Namespace Prefix:
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Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=checu_CaymanSponsorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: