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Note 4 - Inventories - Summary of Inventories (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Component parts and other materials	$ 162,660	$ 79,339
Total inventories	1,551,842	1,541,513
Dental Segment [Member]
Finished goods, net	(900,396)	(342,465)
Finished goods, net	900,396	342,465
Medical Segment [Member]
Finished goods, net	(488,786)	(1,119,709)
Finished goods, net	$ 488,786	$ 1,119,709

X

- Definition

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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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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