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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

X

- Definition

The amount of amortization of fir value of below market time charters acquired.

+ References

No definition available.

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X

- Definition

The amount of below market time charters acquired classified as noncurrent.

+ References

No definition available.

+ Details

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X

- Definition

The fair value of below market time charters.

+ References

No definition available.

+ Details

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- Details

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