| Personnel expenses | 12 months ended 31.12.2019 |
12 months ended 31.12.2018 |
| Payroll expenses | (1,124,367) | (747,229) |
| Payroll charges | (185,938) | (124,769) |
| Employee benefits | (30,283) | (34,441) |
| Costs of restructuring provision | (2,609) | (133,727) |
| Costs of provision for future liabilities arising from unused annual leave and retirement benefits | (11,077) | (3,818) |
| Appropriations to Social Benefits Fund | (12,808) | (8,842) |
| Other | (1,695) | (4,363) |
| Total personnel expenses | (1,368,777) | (1,057,189) |