Issued Shares
| Concept | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | 
|---|---|---|---|---|---|---|---|
| Issued shares | |||||||
| Issued shares | |||||||
| Number of shares | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                18,040,200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                7,600
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                18,056,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                9,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Number of voting rights | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                180,402
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                180,402
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
| Description |  | 
                                                権利内容に何ら限定のない当社における標準的となる株式
                                                
                                             |  | — |  |  | 
                                                自己保有株式
                                                
                                             |