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Note 5 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Intangible assets	$ 635,621	$ 673,147
Less accumulated amortization	(596,254)	(558,554)
Intangible assets, net	39,367	114,593
Customer Relationships [Member]
Intangible assets	461,997	489,273
Patents [Member]
Intangible assets	$ 173,624	$ 183,874

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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