Note 3 - Fair Value Measurements (Details Textual)	Sep. 30, 2015
Fair Value, Inputs, Level 1 [Member]
Investment Portfolio Percentage	9.80%
Fair Value, Inputs, Level 2 [Member]
Investment Portfolio Percentage	90.20%

Represents a percentage of the investment portfolio.

No definition available.

Name:	cnfr_InvestmentPortfolioPercentage
Namespace Prefix:	cnfr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant