v3.25.4

Private Placement (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) $ / shares shares
Private Placement [Line Items]
Gross proceeds (in Dollars) | $	$ 6,400,000
Public shares redeem percentage	100.00%
Sponsor [Member]
Private Placement [Line Items]
Number of shares issued	420,000
Private Placement [Member]
Private Placement [Line Items]
Number of shares issued	640,000
Sale of stock price per share (in Dollars per share) | $ / shares	$ 10
Gross proceeds (in Dollars) | $	$ 6,400,000
Private Placement [Member] | Rights [Member]
Private Placement [Line Items]
Number of shares in a unit	1
Private Placement [Member] | J.V.B. Financial Group, LLC [Member]
Private Placement [Line Items]
Number of shares issued	176,000
Private Placement [Member] | JonesTrading Institutional Services LLC [Member]
Private Placement [Line Items]
Number of shares issued	44,000
Private Placement [Member] | Class A Ordinary Share [Member]
Private Placement [Line Items]
Number of shares in a unit	1

X

- Definition

Represents the number of shares in a unit.

+ References

No definition available.

+ Details

Name:	chacu_NumberOfSharesIssuedPerUnit
Namespace Prefix:	chacu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage obligation to redeem public shares

+ References

No definition available.

+ Details

Name:	chacu_PercentageObligationToRedeemPublicShares
Namespace Prefix:	chacu_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of new units issued during the period.

+ References

No definition available.

+ Details

Name:	chacu_UnitsIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	chacu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

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

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

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

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=us-gaap_RightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: