Note 4 - Inventories - Summary of Inventories (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Component parts and other materials	$ 47,092	$ 218,486
Total inventories	3,329,101	2,638,186
Dental Segment [Member]
Finished goods, net	3,282,009	2,404,970
Medical Segment [Member]
Finished goods, net	$ 0	$ 14,730

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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