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                    Closing price on 9/14/2021
                 |  |  
    
        |           
                
                    | Open | 2.90 |  
                    | High | 3.10 |  
                    | Low | 2.80 |  
                    | Volume | 518,500 |  
                    | Split-adjusted Price | 3.10 |  
                
             | 
 |  SDP Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 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 |   |  
            | 8/2/2021 | 0.00 / 0.00% | 1.90 | 2.00 | 1.90 | 2.00 | 2.00 | 2.00 | 15,500 |   |  |