| 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           | 
              
          
                  | 
            In-Class Group Evaluations of Short Videos           | 
                  
            percent           | 
                  
            0           | 
                  
            2 years ago           |