Share-based Compensation Arrangement by Share-based Payment Award, Grant Date

No definition available.

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Namespace Prefix:	tgc_
Data Type:	xbrli:dateItemType
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- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Details

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

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Stock Options (Schedule Of Options Issued) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	100,000	75,000	87,500
Exercise Price	$ 0.57	$ 0.59	$ 0.61	$ 0.61
$0.41 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	25,000
Exercise Price	$ 0.41
Grant Date	Jan. 03, 2014
Expiration Date	Jan. 02, 2019
$0.41 [Member] \| Non-Executive Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	6,250
$0.48 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	25,000
Exercise Price	$ 0.48
Grant Date	Apr. 01, 2014
Expiration Date	Mar. 31, 2019
$0.48 [Member] \| Non-Executive Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	6,250
$0.44 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	25,000
Exercise Price	$ 0.44
Grant Date	Jul. 02, 2014
Expiration Date	Jul. 01, 2019
$0.44 [Member] \| Non-Executive Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	6,250
$0.44 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	25,000
Exercise Price	$ 0.44
Grant Date	Oct. 02, 2014
Expiration Date	Oct. 01, 2019
$0.44 [Member] \| Non-Executive Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Issued	6,250