Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Segment and Geographic Data - Summary of Operations by Geographic Area (Details)

v3.8.0.1
Note 12 - Segment and Geographic Data - Summary of Operations by Geographic Area (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Product sales, net $ 1,805,605 $ 3,688,988
Product sales, net 1,805,605 3,688,988
Domestic [Member]    
Product sales, net 918,430 1,715,072
Product sales, net 918,430 1,715,072
Domestic [Member] | Devices [Member]    
Product sales, net 121,048 185,645
Product sales, net 121,048 185,645
Domestic [Member] | Handpieces [Member]    
Product sales, net 768,531 1,510,486
Product sales, net 768,531 1,510,486
Domestic [Member] | Manufactured Product, Other [Member]    
Product sales, net 28,851 18,941
Product sales, net 28,851 18,941
Rest of World [Member]    
Product sales, net 887,175 972,116
Product sales, net 887,175 972,116
Rest of World [Member] | Devices [Member]    
Product sales, net 279,468 358,670
Product sales, net 279,468 358,670
Rest of World [Member] | Handpieces [Member]    
Product sales, net 582,827 583,349
Product sales, net 582,827 583,349
Rest of World [Member] | Manufactured Product, Other [Member]    
Product sales, net 24,880 30,097
Product sales, net 24,880 30,097
CHINA    
Product sales, net 1,001,800
Product sales, net 1,001,800
CHINA | Devices [Member]    
Product sales, net 1,000,000
Product sales, net 1,000,000
CHINA | Handpieces [Member]    
Product sales, net
Product sales, net
CHINA | Manufactured Product, Other [Member]    
Product sales, net 1,800
Product sales, net $ 1,800