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Note 8 - Related Party Transactions (Details Textual)								1 Months Ended			9 Months Ended	12 Months Ended
	Jan. 01, 2024 USD ($)	Jan. 01, 2024 EUR (€)	Jan. 01, 2023 USD ($)	Jan. 01, 2023 EUR (€)	Jan. 01, 2022 EUR (€)	Jan. 01, 2018	Jan. 01, 2012	Jun. 30, 2022 USD ($)	May 31, 2022 USD ($)	Oct. 31, 2021 USD ($)	Sep. 30, 2020	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / €	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 EUR (€)	Nov. 01, 2019 USD ($)
Related Party Agreement Term (Year)			5 years	5 years		5 years	5 years
Service Management Costs Daily Fee Related Party			$ 853	€ 775	€ 720												€ 685
Related Party Transaction Daily Fee Per Vessel Per Day in Lay Up			$ 426	€ 387.5	€ 360											€ 342.5
Foreign Currency Exchange Rate, Remeasurement (in USD per EUR) | $ / €													1.1
Accounts Receivable, after Allowance for Credit Loss, Current													$ 2,037,940	$ 572,961
Eurobulk Ltd. [Member]
Related Party Transaction, Amounts of Transaction													2,150,000	2,000,000	$ 2,000,000
Eurobulk Ltd. [Member] | Vessel Management Fees [Member]
Related Party Transaction, Amounts of Transaction													5,720,831	4,920,063	4,294,789
Eurobulk Ltd. [Member] | Fixed Management Fees [Member] | Special Bonus to Employees and Consultants [Member]
Related Party Transaction, Amounts of Transaction													500,000	420,000	460,000
Eurobulk Ltd. [Member] | Executive Management Fees [Member] | Special Bonus to Employees and Consultants [Member]
Related Party Transaction, Amounts of Transaction													2,650,000	2,420,000	2,460,000
Annual Compensation [Member] | Eurobulk Ltd. [Member] | Forecast [Member]
Related Party Transaction, Amounts of Transaction												$ 2,250,000
Related Party [Member]
Accounts Receivable, after Allowance for Credit Loss, Current													0	$ 32,146
Accounts Payable													$ 1,298,941
First Debt Agreement [Member] | Colby Trading Ltd [Member]
Notes and Loans Payable																		$ 2,500,000
Debt Instrument, Interest Rate, Stated Percentage																		8.00%
Second Debt Agreement [Member] | Colby Trading Ltd [Member]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total															50,000
Eurochart [Member] | Vessel Sales [Member]
Related Party Transaction Commission, Percentage											1.00%		1.00%	1.00%
Commission for Sale of Vessels													$ 142,266	$ 0	0
Eurochart [Member] | Charter Revenues [Member]
Related Party Transaction, Amounts of Transaction													2,350,919	$ 2,370,381	1,075,274
Related Party Transaction Commission, Percentage											1.25%
Eurochart [Member] | Vessel Sales, Commission [Member]
Related Party Transaction, Amounts of Transaction													400,000
Eurochart [Member] | Vessel Sales, Commission [Member] | MV Jonathan P [Member]
Related Party Transaction, Amounts of Transaction										$ 255,000
Eurochart [Member] | Vessel Sales, Commission [Member] | M/V Emmanuel P [Member]
Related Party Transaction, Amounts of Transaction								$ 175,000	$ 175,000
Sentinel [Member]
Related Party Transaction Commission on Premium, Maximum, Percentage														5.00%
Sentinel [Member] | Crew Fees [Member]
Related Party Transaction, Amounts of Transaction													108,208	$ 118,614	77,896
Technomar [Member]
Related Party Transaction Amounts of Transaction Per Crew Member Per Month														50
Technomar [Member] | Crew Fees [Member]
Related Party Transaction, Amounts of Transaction													$ 236,416	$ 235,228	$ 155,739
Subsequent Event [Member]
Service Management Costs Daily Fee Related Party	$ 891	€ 810
Related Party Transaction Daily Fee Per Vessel Per Day in Lay Up	$ 446	€ 405

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- Definition

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+ References

No definition available.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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