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Note 6 - Fair Value of Below Market Time Charters Acquired (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Aug. 31, 2019
Amortization of fair value of below market time charters acquired | $ 857,945 |  |  |
Below Market Time Charters Acquired, Noncurrent | $ 1,714,370 |  |  |
Fair Value, Inputs, Level 2 [Member] | EM Hydra, EM Kea and EM Spetses [Member] |  |  |  |
Below Market Time Charters, Fair Value |  |  |  | $ 778,287
Fair Value, Inputs, Level 2 [Member] | Synergy Keelung, Synergy Oakland and Synergy Busan [Member] |  |  |  |
Below Market Time Charters, Fair Value |  |  |  | $ 1,794,028

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- Definition The amount of amortization of fir value of below market time charters acquired. + References No definition available. + Details
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- Definition The amount of below market time charters acquired classified as noncurrent. + References No definition available. + Details
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- Definition The fair value of below market time charters. + References No definition available. + Details
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- Details
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- Details
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- Details
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