Analysis Of Income And Expense [Abstract]
| Concept | 
                                    
                                        2021-01-01 to 2021-12-31  | 
                            
                                
                                    
                                        2020-01-01 to 2020-12-31  | 
                            
                        
|---|---|---|
| Analysis of income and expense [abstract] | ||
| Revenue [abstract] | ||
| Revenue | 
                                        
                                             
                                                19,106
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                10,869
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Material income and expense [abstract] | ||
| Gains (losses) on litigation settlements [abstract] | ||
| Losses on litigation settlements | 
                                        
                                             
                                                142,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                -
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Finance income (cost) | 
                                        
                                             
                                                1,356
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,889
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Revenue and other operating income | 
                                        
                                             
                                                21,687
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                14,199
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Expenses by nature [abstract] | ||
| Services expense | 
                                        
                                             
                                                9,172
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                6,150
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Classes of employee benefits expense [abstract] | ||
| Employee benefits expense | 
                                        
                                             
                                                6,846
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                6,489
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||
| Depreciation and amortisation expense [abstract] | ||
| Depreciation and amortisation expense | 
                                        
                                             
                                                2,952
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                2,943
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Other expenses, by nature | 
                                        
                                             
                                                1,386
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,872
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Expenses, by nature | 
                                        
                                             
                                                20,498
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                17,454
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Disclosure of attribution of expenses by nature to their function [text block] | — | — | 
| Disclosure of attribution of expenses by nature to their function [abstract] | ||
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Comprehensive income, continuing and discontinued operations [abstract] | ||
| Comprehensive income | 
                                        
                                             
                                                167,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                5,144
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             
                                        
                                     |