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Condensed Schedule of Investments (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2014
Debt Instrument, Collateral Amount	$ 238,536
NNYMEX Natural Gas Futures NG August 2014 contracts, expiring July 2014 [Member]
Expiration date	July 2014
NYMEX Natural Gas Futures NG September 2014 contracts, expiring August 2014 [Member]
Expiration date	August 2014
NYMEX Natural Gas Futures NG October 2014 contracts, expiring September 2014 [Member]
Expiration date	September 2014
NYMEX Natural Gas Futures NG November 2014 contracts, expiring October 2014 [Member]
Expiration date	October 2014
NYMEX Natural Gas Futures NG December 2014 contracts, expiring November 2014 [Member]
Expiration date	November 2014
NYMEX Natural Gas Futures NG January 2015 contracts, expiring December 2014 [Member]
Expiration date	December 2014
NYMEX Natural Gas Futures NG February 2015 contracts, expiring January 2015 [Member]
Expiration date	January 2015
NYMEX Natural Gas Futures NG March 2015 contracts, expiring February 2015 [Member]
Expiration date	February 2015
NYMEX Natural Gas Futures NG April 2015 contracts, expiring March 2015 (Member)
Expiration date	March 2015
NYMEX Natural Gas Futures NG May 2015 contracts, expiring April 2015 [Member]
Expiration date	April 2015
NYMEX Natural Gas Futures NG June 2015 contracts, expiring May 2015 [Member]
Expiration date	May 2015
NYMEX Natural Gas Futures NG July 2015 contracts, expiring June 2015 [Member]
Expiration date	June 2015
Cash Equivalents [Member] | Us Treasury Bill Securities [Member] | Us Treasury Securities [Member]
Expiration date	10/30/2014
Interest Rate	0.04%

X

- Definition

Amount of assets pledged to secure a debt instrument.

+ 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 (d)

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

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X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: 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)(1))

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

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X

- Definition

The list of dates or date range within which the options may be exercised of the investment subject to option.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 320

-Section S99

-Paragraph 6

-Subparagraph (SX 210.12-14.4(b))

-URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611322-123010



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 14

-Paragraph 4

-Subparagraph b

-Article 12



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 320

-Section S99

-Paragraph 5

-Subparagraph (SX 210.12-13.5(d))

-URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611282-123010



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 13

-Paragraph 5

-Subparagraph d

-Article 12

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