Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (19,784,100)us-gaap_NetIncomeLoss	$ (11,407,519)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided (used) by operating activities:
Depreciation, depletion, amortization and accretion	7,448,799	2,365,280
Amortization of financing costs and debt discount	8,426,119	3,484,843
Share-based compensation	698,122	919,755
(Gain) loss on sale of assets	(188,616)us-gaap_GainLossOnDispositionOfAssets	1,900us-gaap_GainLossOnDispositionOfAssets
Interest and legal expense added to principal	1,818,240	3,329,349
Unrealized gain on warrant derivative		(595,245)teng_DerivativeGainLossOnWarrantNet
Unrealized loss (gain) on commodity derivative assets	142,636	(522,733)
Realized gain on commodity derivative assets	(80,103)	(237,419)
Changes in operating assets and liabilities:
Accounts receivable, trade	(2,423,008)	(453,245)
Accounts receivable due from operator, net	(562,000)	(2,098,899)
Prepaid expenses and other current assets	(8,691)	(250,662)
Other assets	(51,494)	(1,471)
Accounts payable and accrued expenses	47,444	1,646,322
Environmental settlement and related costs	6,600,000us-gaap_EnvironmentalRemediationExpense
Revenue payable	(81,822)	(75,659)
Net cash provided (used) by operating activities	2,001,526	(3,657,984)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of assets	15,259,668	2,625,025
Expenditures for oil and gas properties	(24,064,991)	(23,829,183)
Expenditures for property and equipment	(8,470)	(9,141)
Net cash used by investing activities	(8,813,793)	(21,213,299)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing costs paid	(4,706,656)us-gaap_PaymentsOfFinancingCosts	(122,230)us-gaap_PaymentsOfFinancingCosts
Payments on notes payable	(98,703,469)us-gaap_RepaymentsOfNotesPayable	(16,212)us-gaap_RepaymentsOfNotesPayable
Proceeds from notes payable	108,093,750us-gaap_ProceedsFromNotesPayable	25,000,000us-gaap_ProceedsFromNotesPayable
Stock options exercised	717,064	13,750
Net cash provided by financing activities	5,400,689	24,875,308
NET CHANGE IN CASH	(1,411,578)	4,025
CASH, BEGINNING OF PERIOD	2,727,832us-gaap_Cash	1,009,084us-gaap_Cash
CASH, END OF PERIOD	1,316,254us-gaap_Cash	1,013,109us-gaap_Cash
SUPPLEMENTAL DISCLOSURES FOR CASH FLOW INFORMATION:
Interest	8,550,179us-gaap_InterestPaid	4,482,229us-gaap_InterestPaid
Income taxes
Non-cash investing and financing activities:
Accrued expenditures for oil and gas properties	3,684,099	1,112,214
Increase in asset retirement obligation	37,116	689
Accrued expenditures for debt financing		$ 401,625

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+ References

+ Details

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

The cash outflow for a borrowing supported by a written promise to pay an obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

+ Details

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