Financial Instruments and Fair Value Disclosures (Details 3) (USD $)	9 Months Ended	12 Months Ended
Mar. 31, 2014	Mar. 31, 2015 item
Effect of derivative instruments on the consolidated statements of operations
Change in fair value	$ 2,623,456us-gaap_UnrealizedGainLossOnDerivatives	$ 1,331,954us-gaap_UnrealizedGainLossOnDerivatives
Gain/(loss) on derivatives-net	(1,104,001)	(3,959,203)
Number of independent appraisals		3lpg_NumberOfIndependentAppraisals
Asset Impairment Charges		1,431,818us-gaap_AssetImpairmentCharges
Interest rate swaps \| Derivatives not designated as hedging instruments \| Gain/(loss) on derivatives
Effect of derivative instruments on the consolidated statements of operations
Change in fair value	2,623,456	1,331,954
Realized loss	(3,727,457)	(5,291,157)
Gain/(loss) on derivatives-net	$ (1,104,001)	$ (3,959,203)

Represents the number of independent appraisals used in the determination of impairment of vessel.

No definition available.

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228

+ Details

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- Details

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- Definition

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959

+ Details

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- Definition

The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13(h))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

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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 derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

+ Details

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