Note D - Inventories - Summary of Inventories (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Component parts and other materials	$ 99,885	$ 123,918
Total inventories	1,620,509	1,921,051
Dental Segment [Member]
Finished goods, net	1,306,763	1,609,000
Medical Segment [Member]
Finished goods, net	$ 213,861	$ 188,133

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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