| 
                 
                    Closing price on 9/15/2021
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    3.50 | 
                 
                
                    | High | 
                    3.50 | 
                 
                
                    | Low | 
                    3.00 | 
                     
                
                    | Volume | 
                    910,600 | 
                                 
                
                    | Split-adjusted Price | 
                    3.40 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
SDP Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/15/2021
             | 
            
                +0.30 / +9.68%
             |             
            
                3.50
             |           
            
                3.50
             |               
            
                3.00
             |                           
            
                3.40
             | 
            
                3.40
             |                     
            
                3.40
             |                                 
            
                910,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/14/2021
             | 
            
                +0.40 / +14.81%
             |             
            
                2.90
             |           
            
                3.10
             |               
            
                2.80
             |                           
            
                3.10
             | 
            
                3.10
             |                     
            
                3.10
             |                                 
            
                518,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/13/2021
             | 
            
                +0.30 / +12.00%
             |             
            
                2.60
             |           
            
                2.80
             |               
            
                2.50
             |                           
            
                2.80
             | 
            
                2.70
             |                     
            
                2.80
             |                                 
            
                547,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/10/2021
             | 
            
                +0.10 / +4.00%
             |             
            
                2.50
             |           
            
                2.60
             |               
            
                2.40
             |                           
            
                2.60
             | 
            
                2.50
             |                     
            
                2.60
             |                                 
            
                201,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/9/2021
             | 
            
                +0.10 / +4.17%
             |             
            
                2.40
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.50
             | 
            
                2.50
             |                     
            
                2.50
             |                                 
            
                104,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/8/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.50
             |           
            
                2.50
             |               
            
                2.40
             |                           
            
                2.50
             | 
            
                2.40
             |                     
            
                2.50
             |                                 
            
                54,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/7/2021
             | 
            
                -0.20 / -7.69%
             |             
            
                2.60
             |           
            
                2.70
             |               
            
                2.40
             |                           
            
                2.40
             | 
            
                2.50
             |                     
            
                2.40
             |                                 
            
                274,500
             |            
            
                 
             |                                       
         
    
        
            | 
                9/6/2021
             | 
            
                +0.10 / +4.00%
             |             
            
                2.60
             |           
            
                2.70
             |               
            
                2.50
             |                           
            
                2.60
             | 
            
                2.60
             |                     
            
                2.60
             |                                 
            
                204,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/1/2021
             | 
            
                +0.10 / +4.17%
             |             
            
                2.50
             |           
            
                2.60
             |               
            
                2.40
             |                           
            
                2.50
             | 
            
                2.50
             |                     
            
                2.50
             |                                 
            
                357,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2021
             | 
            
                +0.10 / +4.17%
             |             
            
                2.40
             |           
            
                2.50
             |               
            
                2.40
             |                           
            
                2.50
             | 
            
                2.40
             |                     
            
                2.50
             |                                 
            
                90,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.20
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                178,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2021
             | 
            
                +0.10 / +4.35%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.30
             |                           
            
                2.40
             | 
            
                2.40
             |                     
            
                2.40
             |                                 
            
                52,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/26/2021
             | 
            
                +0.30 / +14.29%
             |             
            
                2.10
             |           
            
                2.40
             |               
            
                2.10
             |                           
            
                2.40
             | 
            
                2.30
             |                     
            
                2.40
             |                                 
            
                130,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/25/2021
             | 
            
                -0.20 / -9.09%
             |             
            
                2.30
             |           
            
                2.30
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.10
             |                     
            
                2.00
             |                                 
            
                221,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.20
             |           
            
                2.30
             |               
            
                2.00
             |                           
            
                2.30
             | 
            
                2.20
             |                     
            
                2.30
             |                                 
            
                198,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2021
             | 
            
                -0.30 / -11.54%
             |             
            
                2.70
             |           
            
                2.70
             |               
            
                2.30
             |                           
            
                2.30
             | 
            
                2.30
             |                     
            
                2.30
             |                                 
            
                433,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2021
             | 
            
                +0.30 / +12.50%
             |             
            
                2.70
             |           
            
                2.70
             |               
            
                2.50
             |                           
            
                2.70
             | 
            
                2.60
             |                     
            
                2.70
             |                                 
            
                433,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/19/2021
             | 
            
                +0.30 / +13.64%
             |             
            
                2.30
             |           
            
                2.50
             |               
            
                2.20
             |                           
            
                2.50
             | 
            
                2.40
             |                     
            
                2.50
             |                                 
            
                353,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/18/2021
             | 
            
                +0.30 / +15.00%
             |             
            
                2.00
             |           
            
                2.30
             |               
            
                2.00
             |                           
            
                2.30
             | 
            
                2.20
             |                     
            
                2.30
             |                                 
            
                713,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                16,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                38,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                52,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/12/2021
             | 
            
                +0.10 / +5.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.00
             |                     
            
                2.10
             |                                 
            
                48,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2021
             | 
            
                +0.10 / +5.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.00
             |                     
            
                2.10
             |                                 
            
                88,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.00
             |                     
            
                2.10
             |                                 
            
                51,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.10
             |           
            
                2.10
             |               
            
                2.00
             |                           
            
                2.10
             | 
            
                2.10
             |                     
            
                2.10
             |                                 
            
                11,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2021
             | 
            
                +0.10 / +4.76%
             |             
            
                2.20
             |           
            
                2.30
             |               
            
                2.00
             |                           
            
                2.20
             | 
            
                2.10
             |                     
            
                2.20
             |                                 
            
                44,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2021
             | 
            
                +0.20 / +10.00%
             |             
            
                2.00
             |           
            
                2.30
             |               
            
                2.00
             |                           
            
                2.20
             | 
            
                2.10
             |                     
            
                2.20
             |                                 
            
                94,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/4/2021
             | 
            
                +0.10 / +5.00%
             |             
            
                2.00
             |           
            
                2.10
             |               
            
                1.90
             |                           
            
                2.10
             | 
            
                2.00
             |                     
            
                2.10
             |                                 
            
                58,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/3/2021
             | 
            
                0.00 / 0.00%
             |             
            
                2.00
             |           
            
                2.00
             |               
            
                1.90
             |                           
            
                2.00
             | 
            
                2.00
             |                     
            
                2.00
             |                                 
            
                25,200
             |  
            
                 
             |                                                              
             
    
         
    
    
 |