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Note 20 - Subsequent Events (Details Textual) |  | 2 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 01, 2017 USD ($) | Mar. 16, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Long-term Debt |  |  | $ 400,229,914 | $ 424,660,265
Subsequent Event [Member] | Two Liquified Petroleum Gas Carriers Under Construction [Member] |  |  |  |
Payments for Construction in Process |  | $ 15,624,000 |  |
Term Loan to Finance the Acquisition of two LPG Carriers [Member] | Subsequent Event [Member] |  |  |  |
Long Term Debt, Number of Quarterly Installments | 32 |  |  |
Term Loan to Finance the Acquisition of two LPG Carriers [Member] | Subsequent Event [Member] | Maximum [Member] |  |  |  |
Long-term Debt | $ 76,020,000 |  |  |

X
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow from construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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