Note M - Product Sales and Significant Customers and Vendors - Sales by Product and by Geographical Region (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Product sales, net	$ 10,482,005	$ 9,491,569
Sales Revenue, Goods, Net [Member] | Geographic Concentration Risk [Member]
Product sales, net	$ 10,482,005	$ 9,491,569
Product sales, percent	100.00%	100.00%
Domestic [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 3,098,304	$ 3,506,342
Product sales, percent	100.00%	100.00%
Domestic [Member] | Sales Revenue, Goods, Net [Member] | Geographic Concentration Risk [Member]
Product sales, net	$ 3,098,304	$ 3,506,342
Product sales, percent	29.60%	36.90%
Domestic [Member] | Instruments [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 852,148	$ 623,195
Product sales, percent	27.50%	17.80%
Domestic [Member] | Handpieces [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 2,102,394	$ 2,799,785
Product sales, percent	67.90%	79.80%
Domestic [Member] | Other Products [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 143,762	$ 83,362
Product sales, percent	4.60%	2.40%
International [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 7,383,701	$ 5,985,227
Product sales, percent	100.00%	100.00%
International [Member] | Sales Revenue, Goods, Net [Member] | Geographic Concentration Risk [Member]
Product sales, net	$ 7,383,701	$ 5,985,227
Product sales, percent	70.40%	63.10%
International [Member] | Instruments [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 3,264,633	$ 2,062,556
Product sales, percent	44.20%	34.50%
International [Member] | Handpieces [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 4,063,811	$ 3,836,002
Product sales, percent	55.10%	64.10%
International [Member] | Other Products [Member] | Sales Revenue, Goods, Net [Member] | Product Concentration Risk [Member]
Product sales, net	$ 55,257	$ 86,669
Product sales, percent	0.70%	1.40%