Annual fees

No definition available.

Name:	icmb_AnnualFees
Namespace Prefix:	icmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Directors' fees payable.

+ References

No definition available.

+ Details

Name:	icmb_DirectorsFeesPayable
Namespace Prefix:	icmb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

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

- Definition

A payment from an investee, in which the investment basis has previously been reduced to zero. This amount reduces net cash used in operating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

+ Details

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

- Details

Name:	srt_TitleOfIndividualAxis=srt_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=srt_DirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=icmb_ChairPersonOfAuditCommitteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=icmb_ValuationCommitteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=icmb_NominatingAndCorporateGovernanceCommitteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=icmb_CompensationCommitteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Directors Fees - Additional Information (Details) - USD ($)	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Directors' fees	$ 73,375	$ 75,625
Directors' fees payable	5,130		$ 15,755
Board of Directors Chairman
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Reimbursement expense	1,000
Independent Director
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Annual fees	75,000
Reimbursement expense	2,500
Chair Person Of Audit Committee
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Annual fees	7,500
Valuation Committee
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Annual fees	2,500
Nominating And Corporate Governance Committee
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Annual fees	2,500
Compensation Committee
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Annual fees	$ 2,500