Represents information pertaining to additional deferred conversion costs incurred by the bank.

No definition available.

Name:	csbf_AdditionalDeferredConversionCosts
Namespace Prefix:	csbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents information pertaining to deferred conversion costs incurred by the bank.

+ References

No definition available.

+ Details

Name:	csbf_DeferredConversionCosts
Namespace Prefix:	csbf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents information pertaining to the maximum Percentage of shares of common stock proposed to be subscribed for or purchased by the employee stock ownership plan in connection with a stock offering or conversion transaction..

+ References

No definition available.

+ Details

Name:	csbf_MaximumEmployeeStockOwnershipPlanSubscriptionPercentage
Namespace Prefix:	csbf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents information pertaining to minimum votes to the total votes required for the approval of conversion plan.

+ References

No definition available.

+ Details

Name:	csbf_MinimumVotesRequiredForApprovalOfConversionPlan
Namespace Prefix:	csbf_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

- Details

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

SUBSEQUENT EVENTS (Details) - USD ($)	Apr. 01, 2026	Jun. 29, 2026	Mar. 31, 2026	Mar. 05, 2026
SUBSEQUENT EVENTS
Minimum votes required for approval				0.67%
ESOP subscription percentage in plan of conversion				8.00%
Deferred conversion costs			$ 397,125
Subsequent Event
SUBSEQUENT EVENTS
Deferred conversion costs		$ 814,552
Additional deferred conversion costs	$ 417,427