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Deposits (Details Narrative) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Notes to Financial Statements
Overdraft deposits reclassified as loans	$ 73,422	$ 133,324

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- Details

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Namespace Prefix:	SGB_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Overdraft Deposits Reclassified

+ References

No definition available.

+ Details

Name:	SGB_OverdraftDepositsReclassified
Namespace Prefix:	SGB_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant