|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2012 
            |  
         
           15.34 
            |  
         
           10.02 
            |  
         
           -5.32 
            |  
         
           -34.68% 
            |  
      
|  
           2013 
            |  
         
           10.02 
            |  
         
           21.00 
            |  
         
           10.98 
            |  
         
           109.58% 
            |  
      
|  
           2014 
            |  
         
           21.00 
            |  
         
           16.82 
            |  
         
           -4.18 
            |  
         
           -19.90% 
            |  
      
|  
           2015 
            |  
        
           16.82 
            |  
         
           11.20 
            |  
         
           -5.62 
            |  
         
           -33.41% 
            |  
      
|  
           2016 
            |  
         
           11.20 
            |  
         
           15.62 
            |  
         
           4.42 
            |  
         
           39.46% 
            |  
      
|  
           2017 
            |  
         
           15.62 
            |  
         
           18.00* 
            |  
         
           2.38 
            |  
         
           15.24% 
            |