Note 6 - Goodwill and Intangibles (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Goodwill [Table Text Block]
 
 
NET
 
 
WD
 
 
Consolidated
 
 
 
Services
 
 
Services
 
 
Total
 
Balances at December 31, 2014
                        
Goodwill
   $
191,215
    $
42,662
    $
233,877
 
Accumulated impairment losses
    
(96,000
 )    
(6,041
 )    
(102,041
 )
     
95,215
     
36,621
     
131,836
 
                         
Foreign currency translation adjustment
    
-
     
(1,878
 )    
(1,878
 )
Balances at December 31, 2015
                        
Goodwill
    
191,215
     
40,784
     
231,999
 
Accumulated impairment losses
    
(96,000
 )    
(6,041
 )    
(102,041
 )
     
95,215
     
34,743
     
129,958
 
                         
Asset impairment charge
    
-
     
(5,224
 )    
(5,224
 )
Foreign currency translation adjustment
    
-
     
(5,110
 )    
(5,110
 )
Balances at December 31, 2016
                        
Goodwill
    
191,215
     
35,674
     
226,889
 
Accumulated impairment losses
    
(96,000
 )    
(11,265
 )    
(107,265
 )
    $
95,215
    $
24,409
    $
119,624
 
Schedule of Finite-Lived Intangible Assets [Table Text Block]
     
December 31,
  
     
2016
  
2015
  
 
Estimated
 
Gross
 
 
 
 
Gross
 
 
 
 
 
 
Useful
 
Carrying
 
 
Accumulated
 
 
Carrying
 
 
Accumulated
 
 
Life (Yrs)
 
Amount
 
 
Amortization
 
 
Amount
 
 
Amortization
 
Customer relationships
15
   $
48,020
    $
(29,941
 )   $
47,973
    $
(26,804
 )
Customer relationships
10
    
27,915
     
(8,147
 )    
38,688
     
(6,126
 )
Trademarks and Trade Names
10
    
13,282
     
(3,431
 )    
15,936
     
(2,523
 )
Developed technology
5
    
2,951
     
(1,525
 )    
3,541
     
(1,121
 )
Total
   $
92,168
    $
(43,044
 )   $
106,138
    $
(36,574
 )
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Year
 
Amount
 
2017
   $
7,682
 
2018
    
7,682
 
2019
    
7,338
 
2020
    
7,092
 
2021
    
7,017
 
Thereafter
    
12,313
 
Total
   $
49,124