Note 4 - Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31, 2021		December 31, 2020
Dental finished goods, net	$	1,337,117	$	1,888,141
Medical finished goods, net		345,754		200,327
Component parts and other materials		337,678		331,711
Total inventories	$	2,020,549	$	2,420,179