The number of shares of common stock registered for a dividend reinvestment plan.

No definition available.

Name:	CNIG_CommonStockRegisteredForDividendReinvestmentPlan
Namespace Prefix:	CNIG_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Quarterly dividend after declaration by Board of Directors of an increase in dividend rate.

+ References

No definition available.

+ Details

Name:	CNIG_QuarterlyDividendAfterIncrease
Namespace Prefix:	CNIG_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Quarterly dividend before declaration by Board of Directors of an increase in dividend rate.

+ References

No definition available.

+ Details

Name:	CNIG_QuarterlyDividendBeforeIncrease
Namespace Prefix:	CNIG_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Dividends (Details Narrative) (USD $)	3 Months Ended	9 Months Ended
Dividends (Details Narrative) (USD $)	Jun. 30, 2009	Jun. 30, 2013	Feb. 12, 2013	Feb. 10, 2013	Jun. 14, 2011	Dec. 14, 2010 Pre-Stock Dividend Dated 04/20/2011
Quarterly dividend before increase						$ 0.15
Quarterly dividend after increase					$ 0.115	$ 0.1725
Dividends declared			$ 0.125	$ 0.12
Date dividend increased declared		Feb. 10, 2012
Date dividend paid		Dec. 21, 2012
Common stock registered for a dividend reinvestment plan	100,000
Shares issued under dividend reinvestment program	2,264