Note 16 - Reportable Segments (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
 
 
Year Ended
 
 
 
December 31,
 
 
December 31,
 
 
December 31,
 
 
 
2016
 
 
2015
 
 
2014
 
Gross revenues
 
 
 
 
 
 
 
 
 
 
 
 
INF
   $
159,514
    $
133,938
    $
98,357
 
BES
    
69,218
     
21,979
     
10,730
 
Elimination of inter-segment revenues
    
(4,822
 )    
(1,262
 )    
(705
 )
Total gross revenues
   $
223,910
    $
154,655
    $
108,382
 
                         
                         
Segment income before taxes
 
 
 
 
 
 
 
 
 
 
 
 
INF
   $
27,688
    $
19,010
    $
13,989
 
BES
    
7,847
     
6,181
     
2,197
 
Total Segment income before taxes
    
35,535
     
25,191
     
16,186
 
Corporate
(1)
    
(17,389
 )    
(11,704
 )    
(8,217
 )
Total income before taxes
   $
18,146
    $
13,487
    $
7,969
 
 
  
December 31,
    
December 31,
  
 
  
2016
    
2015
  
Assets
 
 
 
 
 
 
 
 
INF
   $
100,481
    $
72,331
 
BES
    
83,328
     
12,933
 
Corporate
(1)
    
39,850
     
26,505
 
Total assets
   $
223,659
    $
111,769