Area of land sold.

No definition available.

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- Definition

Assets percentage.

+ References

No definition available.

+ Details

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- Definition

Loan principal balance.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Number Of Wells

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Percentage change in margin interest paid in cash.

+ References

No definition available.

+ Details

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Namespace Prefix:	teng_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of applicable interest rate margin paid in cash.

+ References

No definition available.

+ Details

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Namespace Prefix:	teng_
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- Definition

Percentage of applicable interest rate margin paid in kind.

+ References

No definition available.

+ Details

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Namespace Prefix:	teng_
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- Definition

Percentage of proceeds used for development.

+ References

No definition available.

+ Details

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Namespace Prefix:	teng_
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- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount paid to managing member or general partner, affiliate of managing member or general partner, or affiliate of limited liability company (LLC) or limited partnership (LP) for administrative services provided to the LLC or LP, for example, but not limited to, salaries, rent, or overhead costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: 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=56944662&loc=d3e3179-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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

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Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Subsequent Events - Additional Information (Detail) $ in Millions				6 Months Ended
	Sep. 30, 2015 USD ($)	Jul. 31, 2015 USD ($)	Apr. 03, 2015 USD ($) a	Jun. 30, 2015
Subsequent Event [Line Items]
Borrower's proved reserves				Greater than 1.5 times the net debt
Subsequent Event [Member]
Subsequent Event [Line Items]
Percentage of applicable interest rate margin paid in cash		12.00%
Percentage of applicable interest rate margin paid in kind		14.00%
Percentage change in margin interest paid in cash		9.00%
Credit facility, maturity date		Dec. 31, 2016
Proceeds from sale of assets		$ 17.0
Percentage of proceeds that can be used for development		50.00%
Total fees paid to administrative agent		$ 4.0
Loan balance		$ 1.0
Subsequent Event [Member] \| Net Profits Interest Agreement [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Percentage of increase in NPI assets after sale		2.00%
Subsequent Event [Member] \| Net Profits Interest Agreement [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Percentage of increase in NPI assets after sale		11.00%
Marcellus Shale Wells [Member]
Subsequent Event [Line Items]
Proceeds from sale of assets			$ 47.0
Acres of Land Sold \| a			5,159
Number of wells			12
Marcellus Shale Wells [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Acres of Land Sold \| a			5,159
Number of wells			12
Scenario Forecast [Member]
Subsequent Event [Line Items]
Repayment of debt by borrower	$ 30.0