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Note 12 - Pro Forma Financial Information (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Business Acquisition, Pro Forma Information [Table Text Block]
   
Three-Month Period
   
Six-Month Period
 
   
Ended June 30, 2017
   
Ended June 30, 2017
 
Revenue
  $
11,011
    $
20,868
 
Net income
   
1,194
     
2,134
 
Diluted income per common share
   
0.19
     
0.34