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Note 1 - Organization and Basis for Presentation (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Three months ended March 31,
 
   
2020
   
2019
 
   
($ in thousands)
 
                 
Americas
  $
18,336
    $
16,375
 
Europe, Middle East and Africa
   
10,350
     
10,013
 
Asia/Pacific Rim
   
1,865
     
2,091
 
Total
  $
30,551
    $
28,479