| 
                 
                    Closing price on 5/11/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    2.30 | 
                 
                
                    | High | 
                    2.50 | 
                 
                
                    | Low | 
                    2.20 | 
                     
                
                    | Volume | 
                    63,100 | 
                                 
                
                    | Split-adjusted Price | 
                    2.50 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SDP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/11/2021
             | 
            
                +0.20 / +8.70%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.20
             |                           
            
                2.50
             | 
            
                2.39
             |                     
            
                2.50
             |                                 
            
                63,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.30
             |           
            
                2.40
             |               
            
                2.20
             |                           
            
                2.30
             | 
            
                2.30
             |                     
            
                2.30
             |                                 
            
                74,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2021
             | 
            
                -0.20 / -8.00%
             |             
            
                2.50
             |           
            
                2.60
             |               
            
                2.30
             |                           
            
                2.30
             | 
            
                2.35
             |                     
            
                2.30
             |                                 
            
                101,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2021
             | 
            
                -0.20 / -7.41%
             |             
            
                2.70
             |           
            
                2.70
             |               
            
                2.40
             |                           
            
                2.50
             | 
            
                2.49
             |                     
            
                2.50
             |                                 
            
                255,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.60
             |           
            
                2.80
             |               
            
                2.50
             |                           
            
                2.60
             | 
            
                2.67
             |                     
            
                2.60
             |                                 
            
                99,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2021
             | 
            
                -0.10 / -3.70%
             |             
            
                2.50
             |           
            
                2.70
             |               
            
                2.50
             |                           
            
                2.60
             | 
            
                2.60
             |                     
            
                2.60
             |                                 
            
                16,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2021
             | 
            
                +0.20 / +7.69%
             |             
            
                2.80
             |           
            
                2.80
             |               
            
                2.70
             |                           
            
                2.80
             | 
            
                2.73
             |                     
            
                2.80
             |                                 
            
                42,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2021
             | 
            
                +0.30 / +12.50%
             |             
            
                2.40
             |           
            
                2.70
             |               
            
                2.30
             |                           
            
                2.70
             | 
            
                2.56
             |                     
            
                2.70
             |                                 
            
                407,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2021
             | 
            
                -0.40 / -14.29%
             |             
            
                2.80
             |           
            
                2.80
             |               
            
                2.40
             |                           
            
                2.40
             | 
            
                2.44
             |                     
            
                2.40
             |                                 
            
                146,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.70
             |           
            
                3.00
             |               
            
                2.60
             |                           
            
                2.70
             | 
            
                2.81
             |                     
            
                2.70
             |                                 
            
                51,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2021
             | 
            
                -0.30 / -10.00%
             |             
            
                2.90
             |           
            
                2.90
             |               
            
                2.60
             |                           
            
                2.70
             | 
            
                2.65
             |                     
            
                2.70
             |                                 
            
                125,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2021
             | 
            
                +0.20 / +6.90%
             |             
            
                3.20
             |           
            
                3.20
             |               
            
                2.90
             |                           
            
                3.10
             | 
            
                2.96
             |                     
            
                3.10
             |                                 
            
                66,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2021
             | 
            
                -0.40 / -11.76%
             |             
            
                3.30
             |           
            
                3.30
             |               
            
                2.90
             |                           
            
                3.00
             | 
            
                2.95
             |                     
            
                3.00
             |                                 
            
                306,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2021
             | 
            
                -0.50 / -12.82%
             |             
            
                3.40
             |           
            
                3.40
             |               
            
                3.40
             |                           
            
                3.40
             | 
            
                3.40
             |                     
            
                3.40
             |                                 
            
                126,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2021
             | 
            
                -0.10 / -2.44%
             |             
            
                4.20
             |           
            
                4.20
             |               
            
                3.60
             |                           
            
                4.00
             | 
            
                3.89
             |                     
            
                4.00
             |                                 
            
                64,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2021
             | 
            
                +0.50 / +13.51%
             |             
            
                3.70
             |           
            
                4.20
             |               
            
                3.70
             |                           
            
                4.20
             | 
            
                4.07
             |                     
            
                4.20
             |                                 
            
                436,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2021
             | 
            
                -0.20 / -5.00%
             |             
            
                4.00
             |           
            
                4.00
             |               
            
                3.60
             |                           
            
                3.80
             | 
            
                3.74
             |                     
            
                3.80
             |                                 
            
                144,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2021
             | 
            
                +0.30 / +8.11%
             |             
            
                4.20
             |           
            
                4.20
             |               
            
                3.70
             |                           
            
                4.00
             | 
            
                4.03
             |                     
            
                4.00
             |                                 
            
                331,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2021
             | 
            
                +0.40 / +12.12%
             |             
            
                3.30
             |           
            
                3.70
             |               
            
                3.30
             |                           
            
                3.70
             | 
            
                3.66
             |                     
            
                3.70
             |                                 
            
                227,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2021
             | 
            
                +0.20 / +6.25%
             |             
            
                3.00
             |           
            
                3.40
             |               
            
                3.00
             |                           
            
                3.40
             | 
            
                3.31
             |                     
            
                3.40
             |                                 
            
                73,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2021
             | 
            
                +0.20 / +6.45%
             |             
            
                3.50
             |           
            
                3.50
             |               
            
                2.70
             |                           
            
                3.30
             | 
            
                3.21
             |                     
            
                3.30
             |                                 
            
                190,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2021
             | 
            
                +0.40 / +14.81%
             |             
            
                2.90
             |           
            
                3.10
             |               
            
                2.90
             |                           
            
                3.10
             | 
            
                3.09
             |                     
            
                3.10
             |                                 
            
                114,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2021
             | 
            
                +0.30 / +12.50%
             |             
            
                2.60
             |           
            
                2.70
             |               
            
                2.60
             |                           
            
                2.70
             | 
            
                2.69
             |                     
            
                2.70
             |                                 
            
                77,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2021
             | 
            
                +0.20 / +8.33%
             |             
            
                2.30
             |           
            
                2.60
             |               
            
                2.30
             |                           
            
                2.60
             | 
            
                2.38
             |                     
            
                2.60
             |                                 
            
                89,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.40
             |           
            
                2.40
             |               
            
                2.10
             |                           
            
                2.40
             | 
            
                2.36
             |                     
            
                2.40
             |                                 
            
                22,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2021
             | 
            
                +0.20 / +8.70%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.50
             | 
            
                2.33
             |                     
            
                2.50
             |                                 
            
                32,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2021
             | 
            
                +0.20 / +8.70%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.00
             |                           
            
                2.50
             | 
            
                2.31
             |                     
            
                2.50
             |                                 
            
                54,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.20
             |                           
            
                2.40
             | 
            
                2.28
             |                     
            
                2.40
             |                                 
            
                89,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2021
             | 
            
                +0.10 / +4.17%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.50
             | 
            
                2.40
             |                     
            
                2.50
             |                                 
            
                58,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2021
             | 
            
                +0.20 / +7.69%
             |             
            
                2.60
             |           
            
                2.80
             |               
            
                2.30
             |                           
            
                2.80
             | 
            
                2.39
             |                     
            
                2.80
             |                                 
            
                146,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |