Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Segment and Geographic Data - Summary of Operations by Geographic Area (Details)

v3.19.2
Note 10 - Segment and Geographic Data - Summary of Operations by Geographic Area (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Product sales, net $ 2,257,851 $ 2,428,498 $ 4,173,759 $ 4,234,103
Domestic [Member]        
Product sales, net 1,209,143 1,192,857 2,139,108 2,111,287
Domestic [Member] | Devices [Member]        
Product sales, net 146,289 11,505 270,285 132,553
Domestic [Member] | Handpieces [Member]        
Product sales, net 1,030,391 1,158,975 1,819,544 1,927,506
Domestic [Member] | Other Products [Member]        
Product sales, net 32,463 22,377 49,279 51,228
Rest of World [Member]        
Product sales, net 998,708 1,235,641 1,934,651 2,122,816
Rest of World [Member] | Devices [Member]        
Product sales, net 339,570 367,450 624,915 652,518
Rest of World [Member] | Handpieces [Member]        
Product sales, net 631,129 839,194 1,262,839 1,418,021
Rest of World [Member] | Other Products [Member]        
Product sales, net 28,009 28,997 46,897 52,277
CHINA        
Product sales, net 50,000 100,000
CHINA | Devices [Member]        
Product sales, net
CHINA | Handpieces [Member]        
Product sales, net 50,000 100,000
CHINA | Other Products [Member]        
Product sales, net