Accounts Receivable, Major Customer Percentage

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- Definition

Discontinued Operation, Sale Price

+ References

No definition available.

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- Definition

Length Of Pipeline, Miles

+ References

No definition available.

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- Definition

Number Of Major Customers

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- Definition

Oil and gas property full cost method net current cost discount.

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No definition available.

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- Definition

Oil and Gas Property, Full Cost Method, Unevaluated Properties

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No definition available.

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- Definition

Reversal Of Sharebased Compensation

+ References

No definition available.

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- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

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-Publisher FASB

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-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

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- Definition

A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

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-Publisher SEC

-Name Regulation S-X (SX)

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-Publisher FASB

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-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.1)

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

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-Topic 275

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-Topic 275

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-Section 50

-Paragraph 18

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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

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- Definition

Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

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- Definition

Fair value as of the balance sheet date of price risk derivative assets, net of price risk derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

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-Topic 825

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-Section 50

-Paragraph 15

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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Description Of Business And Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 mi	Dec. 31, 2013	Dec. 31, 2012	Mar. 01, 2013
Description Of Business And Significant Accounting Policies [Line Items]
Length of pipeline, miles	65tgc_LengthOfPipelineMiles
Certificate of Deposit to cover future asset retirement obligations	$ 120,500
Collateral for a bond to appeal a civil penalty			386,000
Unevaluated properties	462,000	736,000
Current cost discount	10.00%
Allowance for doubtful accounts	14,000	14,000
Reversal of compensation expense	59,500tgc_ReversalOfSharebasedCompensation
Federal net operating loss carryforwards	20,200,000us-gaap_OperatingLossCarryforwards
Deferred tax asset	7,351,000us-gaap_DeferredTaxAssetsLiabilitiesNet	7,339,000us-gaap_DeferredTaxAssetsLiabilitiesNet
Derivatives	0	0
Sale price of Swan Creek and Pipeline assets				$ 1,500,000tgc_DiscontinuedOperationSalePrice
Kansas
Description Of Business And Significant Accounting Policies [Line Items]
Customers	2
Customer A [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Customer's percentage of revenue	79.30%	79.80%	79.90%
Customer B [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Customer's percentage of revenue	16.50%	14.90%	14.30%
Customer C [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Customer's percentage of revenue	3.80%	1.70%	2.20%
Two Customers [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Customer's percentage of accounts receivable	84.50%	92.60%
Customer D [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Customer's percentage of accounts receivable	67.80%	80.70%
Minimum [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Federal net operating loss carryforwards expiration between, years	Dec. 31, 2019
Minimum [Member] \| Other Property And Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Estimated useful life	2 years
Maximum [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Federal net operating loss carryforwards expiration between, years	Dec. 31, 2031
Maximum [Member] \| Other Property And Equipment [Member]
Description Of Business And Significant Accounting Policies [Line Items]
Estimated useful life	7 years