| 
                 
                    Closing price on 8/27/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.00 | 
                 
                
                    | High | 
                    4.20 | 
                 
                
                    | Low | 
                    4.00 | 
                     
                
                    | Volume | 
                    98,600 | 
                                 
                
                    | Split-adjusted Price | 
                    3.43 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/27/2012
             | 
            
                -0.30 / -6.98%
             |             
            
                4.00
             |           
            
                4.20
             |               
            
                4.00
             |                           
            
                4.00
             | 
            
                4.10
             |                     
            
                3.43
             |                                 
            
                98,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2012
             | 
            
                +0.20 / +4.88%
             |             
            
                3.90
             |           
            
                4.30
             |               
            
                3.90
             |                           
            
                4.30
             | 
            
                4.11
             |                     
            
                3.69
             |                                 
            
                54,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2012
             | 
            
                -0.30 / -6.82%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.10
             |                           
            
                4.10
             | 
            
                4.11
             |                     
            
                3.52
             |                                 
            
                24,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2012
             | 
            
                -0.30 / -6.38%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.59
             |                     
            
                3.78
             |                                 
            
                68,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2012
             | 
            
                -0.30 / -6.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                4.70
             | 
            
                4.84
             |                     
            
                4.04
             |                                 
            
                153,000
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.09
             |                     
            
                4.29
             |                                 
            
                66,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.02
             |                     
            
                4.29
             |                                 
            
                86,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                4.29
             |                                 
            
                89,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.10
             |                     
            
                4.29
             |                                 
            
                121,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2012
             | 
            
                +0.10 / +2.04%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.04
             |                     
            
                4.29
             |                                 
            
                403,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2012
             | 
            
                -0.10 / -2.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                5.00
             |                     
            
                4.21
             |                                 
            
                185,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2012
             | 
            
                -0.10 / -1.96%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.10
             |                     
            
                4.29
             |                                 
            
                211,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.15
             |                     
            
                4.38
             |                                 
            
                195,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2012
             | 
            
                +0.10 / +2.00%
             |             
            
                5.00
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.06
             |                     
            
                4.38
             |                                 
            
                499,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2012
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.10
             |                     
            
                4.29
             |                                 
            
                192,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2012
             | 
            
                +0.30 / +6.12%
             |             
            
                4.90
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                5.20
             | 
            
                5.06
             |                     
            
                4.47
             |                                 
            
                278,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.80
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                4.90
             | 
            
                4.89
             |                     
            
                4.21
             |                                 
            
                222,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2012
             | 
            
                -0.10 / -2.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.99
             |                     
            
                4.21
             |                                 
            
                463,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.94
             |                     
            
                4.29
             |                                 
            
                62,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2012
             | 
            
                +0.10 / +2.04%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.99
             |                     
            
                4.29
             |                                 
            
                137,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.95
             |                     
            
                4.21
             |                                 
            
                164,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                5.04
             |                     
            
                4.21
             |                                 
            
                65,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.95
             |                     
            
                4.21
             |                                 
            
                251,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2012
             | 
            
                -0.20 / -3.92%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.98
             |                     
            
                4.21
             |                                 
            
                322,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2012
             | 
            
                -0.30 / -5.56%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.23
             |                     
            
                4.38
             |                                 
            
                311,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2012
             | 
            
                -0.40 / -6.90%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.55
             |                     
            
                4.64
             |                                 
            
                363,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2012
             | 
            
                +0.10 / +1.75%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.50
             |                           
            
                5.80
             | 
            
                5.72
             |                     
            
                4.98
             |                                 
            
                124,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2012
             | 
            
                +0.30 / +5.56%
             |             
            
                5.50
             |           
            
                5.70
             |               
            
                5.30
             |                           
            
                5.70
             | 
            
                5.52
             |                     
            
                4.89
             |                                 
            
                151,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.40
             | 
            
                5.35
             |                     
            
                4.64
             |                                 
            
                112,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/17/2012
             | 
            
                +0.20 / +3.85%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.00
             |                           
            
                5.40
             | 
            
                5.24
             |                     
            
                4.64
             |                                 
            
                103,700
             |  
            
                 
             |                                                              
             
    
         
    
    
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