Note 7 - Unpaid Losses and Settlement Expenses (Details Textual) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Change in Businessowner Property and Liability	$ 3.5
Change in Liquor Liability	1.3
Favorable Change in Workers Compensation	$ 1.8

The amount of change in business owner property and liability.

No definition available.

Name:	icch_ChangeInBusinessownerPropertyAndLiability
Namespace Prefix:	icch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration