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Note 5 - Goodwill and Other Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
       
(in thousands)
 
Six Months Ended
June 30, 2018
 
Balance as of the beginning of the period
  $
128,504
 
Goodwill acquired during the period
   
248
 
Balance as of the end of the period
  $
128,752
 
         
Schedule of Finite-Lived Intangible Assets [Table Text Block]
                         
   
June 30, 2018
   
December 31, 2017
   
Useful
   
Weighted Average
 
(in thousands)
 
Gross
   
Accumulated
Amortization
   
Net
   
Gross
   
Accumulated Amortization
   
Net
   
Life (in
years)
   
Useful Life
Remaining (in years)
 
Intangible Assets with finite lives:
                                                               
Marketing assets
  $
930
    $
(387
)   $
543
    $
930
    $
(341
)   $
589
   
10.0
   
5.8
 
Non-compete agreement
   
270
     
(198
)    
72
     
270
     
(190
)    
80
   
2.0
-
5.0
   
4.5
 
Trade secrets
   
250
     
(208
)    
42
     
250
     
(183
)    
67
   
5.0
   
0.8
 
Trade names
   
1,080
     
(270
)    
810
     
1,080
     
-
     
1,080
   
2.0
   
1.5
 
Software technology
   
9,229
     
(445
)    
8,784
     
8,229
     
-
     
8,229
   
10.0
   
9.5
 
Customer relationships
   
10,070
     
(1,800
)    
8,270
     
10,070
     
(1,031
)    
9,039
   
6.0
-
9.0
   
5.3
 
Total intangible assets
  $
21,829
    $
(3,308
)   $
18,521
    $
20,829
    $
(1,745
)   $
19,084
   
 
 
 
   
 
 
                                                                 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
       
(in thousands)
 
Estimated
Amortization Expense
 
Remaining 2018
  $
1,581
 
2019
   
3,128
 
2020
   
2,571
 
2021
   
2,571
 
2022
   
2,571
 
Thereafter
   
6,099
 
Total estimated amortization expense
  $
18,521