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Note 15 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Summary of Financial Instrument Outstanding [Table Text Block]

		Contract Amount
		2015				2014
Commitments to Extend Credit		$	67,889,000			$	68,742,000
Standby Letters of Credit			1,588,212				1,762,000

X

- Definition

Tabular disclosure of off-balance sheet commitments, including commitments to fund loans and unused lines of credit, as well as letters of credit outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	cban_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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