Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept | As at 2021-12-31 | As at 2020-12-31 | As at 2019-12-31 | 
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment | 
                                                66,038
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                68,274
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Investment property [abstract] | |||
| Investment property | 
                                                192,515
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                193,760
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in associates reported in separate financial statements | 
                                                1,304
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                1,304
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables | 
                                                274,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                290,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables | 
                                                35,810
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                29,690
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Categories of non-current financial assets [abstract] | |||
| Non-current financial assets | 
                                                709,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                528,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Categories of current financial assets [abstract] | |||
| Current financial assets | 
                                                5,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                96,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Classes of current inventories [abstract] | |||
| Current inventories | 
                                                31,926
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                27,300
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents | 
                                                715,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                585,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                694,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners | 
                                                -
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                2,271
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings | 
                                                41,803
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                86,520
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings | 
                                                61,415
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                17,080
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables | 
                                                64,364
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                54,852
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Issued capital [abstract] | |||
| Issued capital | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Retained earnings [abstract] | |||
| Retained earnings | 
                                                143,092
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                143,314
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Net assets (liabilities) [abstract] | |||
| Assets | 
                                                333,722
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                327,837
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Net current assets (liabilities) [abstract] | |||
| Current assets | 
                                                68,456
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                59,942
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Current liabilities | 
                                                128,421
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                74,760
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Assets less current liabilities [abstract] |