Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details)

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Note 10 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Product sales, net $ 2,257,851 $ 2,428,498 $ 4,173,759 $ 4,234,103  
Operating Income (Loss) (1,107,831) (1,424,687) (1,926,015) (3,426,340)  
Depreciation and Amortization 25,456 245,127 51,501 510,118  
Income (loss) before taxes and equity in earnings of affiliates (1,097,744) (1,424,517) (1,876,911) (3,425,207)  
Assets 6,788,289   6,788,289   $ 6,400,968
Corporate, Non-Segment [Member]          
Operating Income (Loss) (1,072,647) (1,301,607) (1,891,114) (2,952,043)  
Depreciation and Amortization 15,507 238,546 31,445 482,519  
Income (loss) before taxes and equity in earnings of affiliates (1,060,788) (1,302,787) (1,840,553) (2,954,345)  
Assets 1,101,541   1,101,541   902,816
Dental Segment [Member] | Operating Segments [Member]          
Product sales, net 2,242,751 2,388,898 4,158,259 4,158,003  
Operating Income (Loss) 629,474 723,084 1,121,440 1,080,249  
Depreciation and Amortization 3,950 4,103 7,886 8,244  
Income (loss) before taxes and equity in earnings of affiliates 627,051 725,007 1,120,035 1,084,829  
Assets 5,409,961   5,409,961   5,169,944
Medical Segment [Member] | Operating Segments [Member]          
Product sales, net 15,100 39,600 15,500 76,100  
Operating Income (Loss) (664,658) (846,164) (1,156,341) (1,554,546)  
Depreciation and Amortization 5,999 2,478 12,170 19,355  
Income (loss) before taxes and equity in earnings of affiliates (664,007) $ (846,737) (1,156,393) $ (1,555,691)  
Assets $ 276,787   $ 276,787   $ 328,208