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Note J - Equity-based Compensation (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Share-based Payment Arrangement, Activity [Table Text Block]
   
Number of Options/SARs/
RSUs
    
Weighted
average
exercise price
    
Weighted average
remaining
contractual term
(years) (3)
    
Aggregate value
(**)
  
   
in thousands
    
 
 
 
  
 
 
 
  
in thousands
  
Outstanding at June 30, 2019
    
1,951
     $
3.64
      
4.41
      
 
  
Options granted
    
-
      
-
      
 
      
 
  
SARs granted
    
-
      
-
      
 
      
 
  
RSUs granted
    
-
      
-
      
 
      
 
  
Options / SARs / RSUs cancelled/forfeited/expired
    
(16
 )    
1.11
      
 
      
 
  
Options / SARs exercised and RSUs vested
    
(100
 )   $
2.15
      
 
      
 
  
Outstanding at September 30, 2019 (1)
    
1,835
     $
3.75
      
4.20
     $
18,979
  
Exercisable at September 30, 2019 (2)
    
617
     $
9.63
      
4.12
     $
2,750
  
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
   
Exercisable
    
Unexercisable
    
Total
  
Exercise prices
  
Number of
Options/
SARs / RSUs
(in
thousands)
    
Weighted
average
exercise
price
    
Number of
Options/
SARs / RSUs
(in
thousands)
    
Weighted
average
exercise
price
    
Number of
Options/
SARs /
RSUs (in
thousands)
    
Weighted
average
exercise
price
  
                                                 
Less than $14.09
    
617
     $
9.63
      
1,218
     $
0.77
      
1,835
     $
3.75
  
Above $14.09
    
-
     $
-
      
-
     $
-
      
-
     $
-
  
Total
    
617
     $
9.63
      
1,218
     $
0.77
      
1,835
     $
3.75