| Financial item | 
						December 2023 | 
						December 2022 | 
                        December 2021 | 
              
                        
                       
                      
                        | Amount | 
                        Composition cost | 
                        Increase / decrease rate | 
                        Amount | 
                        Composition cost | 
                        Increase / decrease rate | 
                        Amount | 
                        Composition cost | 
                        Increase / decrease rate | 
                       
                      
                        | Sales | 
						54,929 | 
                        100 | 
                        -26.1 | 
						74,375 | 
                        100 | 
                        -27.4 | 
						102,466 | 
                        100 | 
                        52.3 | 
                     
                       
                      
                        | Gross profit margin (loss) | 
						1,837 | 
                        3.3 | 
                        -70.6 | 
						6,238 | 
                        8.4 | 
                        -48.8 | 
						12,187 | 
                        11.9 | 
                        64.4 | 
                    
      
                       
                      
                        | Operating profit (loss) | 
						4,338 | 
                        7.9 | 
                        162.4 | 
						
						1,653 | 
                        2.2 | 
                        -76.8 | 
						7,133 | 
                        7.0 | 
                        125.6 | 
                       
    
                       
                      
                        | Non-operating income | 
						2,269 | 
                        4.1 | 
                        221.8 | 
						
						
						705 | 
                        0.9 | 
                        12.6 | 
						626 | 
                        0.6 | 
                        -57.1 | 
                       
                      
                        | Non-operating expenses | 
						2,115 | 
                        3.7 | 
                        -23.4 | 
						
						2,761 | 
                        3.7 | 
                        114 | 
						1,290 | 
                        1.3 | 
                        37.9 | 
                      
        
                       
                      
                        | Net income in the current term(loss) | 
							-4,189 | 
                        -7.6 | 
                        1705.6 | 
						
						(232) | 
                        (0.3) | 
                        -104.4 | 
						5,264 | 
                        5.1 | 
                        78.6 | 
                       
     
                                             
                      |