Note 8 - Revenue Recognition - Revenue by Geographic Region (Details) - USD ($)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Net sales	$ 2,481,127	$ 3,254,944
UNITED STATES
Net sales	1,757,267	2,818,937
Non-US [Member]
Net sales	$ 723,860	$ 436,007

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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+ Details