Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Inventories - Summary of Inventories (Details)

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Note 5 - Inventories - Summary of Inventories (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Component parts and other materials $ 25,270 $ 57,652
Inventories, net 3,265,058 3,379,209
Dental Segment [Member]    
Finished goods 2,786,334 2,846,272
Medical Segment [Member]    
Finished goods $ 453,454 $ 475,285