Note 5 - Vessels, Net (Details Textual) - USD ($)					12 Months Ended
Note 5 - Vessels, Net (Details Textual) - USD ($)	Oct. 21, 2025	Aug. 24, 2025	Mar. 17, 2025	Jan. 29, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization					$ 165,890,705	$ 185,465,570
Gain (Loss) on Disposition of Property Plant Equipment					2,793,749	(0)	$ (0)
Asset, Impairment Loss					$ 0	2,796,605	0
Twelve Vessels [Member]
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization						165,900,000
Smart Bunkers Monitoring Systems [Member]
Vessel Improvements							$ 1,300,000
Software for Mooring System Management [Member]
Vessel Improvements						300,000
M/V “Tasos” Vessels [Member]
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization						2,700,000
Proceeds From Sale of Vessel				$ 5,000,000
Gain (Loss) on Disposition of Property Plant Equipment			$ 2,083,596
Inventory on M/V Tasos [Member]
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization						60,000.00
M/V Eirini P [Member]
Proceeds From Sale of Vessel		$ 8,500,000
Gain (Loss) on Disposition of Property Plant Equipment	$ 710,153
M/V Santa Cruz [Member]
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization						8,700,000
Asset, Impairment Loss						$ 2,800,000