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Note 11 - Fair Value of Financial Instruments and Fair Value Measurement (Detail)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Liquidity Risk	5.50%	5.50%

X

- Definition

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+ Details

Name:	chfn_LiquidityRisk
Namespace Prefix:	chfn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration