XML 33 R21.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 4 - Share Based Compensation (Tables)
3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
 
 
Three Months Ended March 31,
 
 
 
2017
 
 
2016
 
                 
                 
Selling, general and administrative
  $
112,856
    $
145,878
 
Research, development and engineering
   
48,233
     
28,485
 
    $
161,089
    $
174,363