Statement Of Financial Position [Abstract]
| Concept | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | 
                                                66,038
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                68,274
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Investment property | — | — | — | — | — | 
                                                192,515
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                193,760
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                2,271
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Deferred tax assets | — | — | — | — | — | 
                                                4,426
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                3,739
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Cash and cash equivalents | — | — | — | — | — | 
                                                715,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                585,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | 
                                                694,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | 
| Assets | — | — | — | — | — | 
                                                333,722
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                327,837
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital | — | — | — | — | — | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Retained earnings | — | — | — | — | — | 
                                                143,092
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                143,314
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Treasury shares | — | — | — | — | — | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other reserves | — | — | — | — | — | 
                                                84,469
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                84,355
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Equity | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                12,283
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                143,092
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                96,535
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                129,889
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                12,397
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                143,314
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                96,535
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                129,553
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                96,535
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                12,172
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                12,909
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                137,536
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                148,248
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                217,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Liabilities [abstract] | |||||||||||||||||||||
| Deferred tax liabilities | — | — | — | — | — | 
                                                21,191
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                21,191
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Equity and liabilities | — | — | — | — | — | 
                                                333,722
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                327,837
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | — | — | — | — | — | — |