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 | 
                                                193,067
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                143,136
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Material income and expense [abstract] | ||
| Finance income (cost) | 
                                                2,038
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                4,129
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Revenue and other operating income | 
                                                204,949
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                161,891
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Operating expense excluding cost of sales | 
                                                17,123
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                14,788
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Expenses by nature [abstract] | ||
| Classes of employee benefits expense [abstract] | ||
| Employee benefits expense | 
                                                22,773
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                23,127
                                                
                                                    
                                                        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 | 
                                                4,712
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                4,199
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Other expenses, by nature | 
                                                1,132
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                5,478
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Expenses, by nature | 
                                                203,449
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                165,557
                                                
                                                    
                                                        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 | 
                                                336,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                7,983
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             |