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Note 2 - Significant Accounting Policies (Details) - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Note 2 - Significant Accounting Policies (Details) [Line Items]
Allowance for Doubtful Accounts Receivable, Current	$ 0	$ 0	$ 0	$ 0
Impairment of Assets, Annual Increase in Undiscounted Cash Flows to Determine Fair Value		1.00%
Impairment of Assets, Inflation Rate for Operating Expenses Used to Determine Fair Value		1.50%
Impairment of Long-Lived Assets Held-for-use	$ 6,775,416	$ 8,238,987	6,168,747	$ 0
Disposal Group, Including Discontinued Operation, Assets, Current			0
Number of Reportable Segments		1
December 31, 2014 [Member] | Reduction in Deferred Finance Charges [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Prior Period Reclassification Adjustment			1,521,543
December 31, 2014 [Member] | Reduction in Long-term Debt [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Prior Period Reclassification Adjustment			1,032,992
December 31, 2014 [Member] | Reduction in Current Portion of Long-term Debt [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Prior Period Reclassification Adjustment			$ 488,551
LPG [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		30 years
Product Carriers [Member]
Note 2 - Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		25 years

X

- Definition

With regard to undiscounted cash flows, this element represents the percentage annual increase in historical average rates that is used in determining the estimates (when there is no charter in place) of the fair value of long-term assets for impairment purposes.

+ References

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With regard to undiscounted cash flows, this element represents the annual inflation rate percentage for operating expenses that is used in determining the estimates of the fair value of long-term assets for impairment purposes.

+ References

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

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Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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