XML 46 R28.htm IDEA: XBRL DOCUMENT v3.19.1
Note 3 - Stock-based Compensation (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
   
Number of
    
Weighted
  
   
stock
    
average grant
  
   
awards
    
date fair
  
   
(in thousands)
    
value
  
                 
Unvested at December 31, 2015
    
330
     $
12.43
  
                 
Granted
    
120
     $
18.92
  
Vested
    
(169
 )   $
5.28
  
Forfeited
    
(16
 )   $
16.53
  
Unvested at December 31, 2016
    
265
     $
18.63
  
                 
Granted
    
434
     $
16.69
  
Vested
    
(96
 )   $
12.78
  
Forfeited
    
(16
 )   $
19.25
  
Unvested at December 31, 2017
    
587
     $
18.14
  
                 
Granted
    
153
     $
30.32
  
Vested
    
(35
 )   $
25.97
  
Forfeited
    
(30
 )   $
27.58
  
Unvested at December 31, 2018
    
675
     $
20.08