XML 36 R34.htm IDEA: XBRL DOCUMENT v3.19.3
Note 4 - Inventories (Details Textual) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Inventory Valuation Reserves, Ending Balance $ 752,000 $ 763,000
Slow Moving Medical Finished Goods [Member]    
Inventory Valuation Reserves, Ending Balance 450,039 454,183
Slow Moving Dental Finished Goods [Member]    
Inventory Valuation Reserves, Ending Balance $ 302,073 $ 309,196