1 January - 30 June (unaudited)
| 
       kEUR  | 
    
       H1 2023  | 
    
       H1 2022  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Cash flow from operating activities  | 
    
       
  | 
    
       
  | 
  
| 
       Result for the period  | 
    
       -34,266  | 
    
       10,247  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Adjustments to reconcile cash generated by operating activities  | 
    
       
  | 
    
       
  | 
  
| 
       Depreciation, amortization and impairment  | 
    
       15,077  | 
    
       11,224  | 
  
| 
       Movement in provisions  | 
    
       -427  | 
    
       -865  | 
  
| 
       Movement in pensions  | 
    
       277  | 
    
       510  | 
  
| 
       Share-based payment expense  | 
    
       393  | 
    
       991  | 
  
| 
       Financial income  | 
    
       -21  | 
    
       -4  | 
  
| 
       Financial expenses  | 
    
       4,784  | 
    
       2,645  | 
  
| 
       Income tax charge  | 
    
       -4,961  | 
    
       2,594  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Changes in net working capital  | 
    
       
  | 
    
       
  | 
  
| 
       (Increase) / decrease in inventories  | 
    
       -6,715  | 
    
       -27,246  | 
  
| 
       (Increase) / decrease in trade receivables  | 
    
       -22,117  | 
    
       18,777  | 
  
| 
       (Increase) / decrease in contract assets  | 
    
       -4,790  | 
    
       -3,989  | 
  
| 
       (Increase) / decrease in other current assets  | 
    
       -1,120  | 
    
       -2,256  | 
  
| 
       Increase / (decrease) in trade payables  | 
    
       -5,106  | 
    
       1,154  | 
  
| 
       Increase / (decrease) in contract liabilities  | 
    
       5,676  | 
    
       -12,803  | 
  
| 
       Increase / (decrease) in other current liabilities  | 
    
       10,786  | 
    
       1,674  | 
  
| 
       Cash generated from operations  | 
    
       -42,530  | 
    
       2,653  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Interest income received  | 
    
       20  | 
    
       4  | 
  
| 
       Interest expenses paid  | 
    
       -1,671  | 
    
       -1,283  | 
  
| 
       Income taxes paid  | 
    
       -4,141  | 
    
       -9,033  | 
  
| 
       Net cash flows from operating activities  | 
    
       -48,322  | 
    
       -7,659  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Cash flow from investing activities  | 
    
       
  | 
    
       
  | 
  
| 
       Acquisition of intangible assets  | 
    
       -2,277  | 
    
       -2,146  | 
  
| 
       Acquisition of property, plant and equipment  | 
    
       -29,089  | 
    
       -39,080  | 
  
| 
       Disposal of property, plant and equipment  | 
    
       0  | 
    
       2  | 
  
| 
       Movement in other financial assets  | 
    
       270  | 
    
       22  | 
  
| 
       Net cash flows from investing activities  | 
    
       -31,096  | 
    
       -41,202  | 
  
1 January - 30 June (unaudited)
| 
       kEUR  | 
    
       H1 2023  | 
    
       H1 2022  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Cash flow from financing activities  | 
    
       
  | 
    
       
  | 
  
| 
       Purchase of own shares  | 
    
       0  | 
    
       -11,962  | 
  
| 
       Dividends paid  | 
    
       0  | 
    
       -9,671  | 
  
| 
       Proceeds from short-term borrowings from banks  | 
    
       55,172  | 
    
       –  | 
  
| 
       Repayment of lease liabilities  | 
    
       -1,411  | 
    
       -1,538  | 
  
| 
       Repayment of other financial liabilities  | 
    
       -276  | 
    
       -288  | 
  
| 
       Net cash flow from financing activities  | 
    
       53,485  | 
    
       -23,459  | 
  
| 
       Net movement in cash and cash equivalents  | 
    
       -25,933  | 
    
       -72,320  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Cash and cash equivalents at the beginning of the period  | 
    
       37,528  | 
    
       136,303  | 
  
| 
       Net foreign currency exchange differences  | 
    
       -2,610  | 
    
       2,453  | 
  
| 
       Cash and cash equivalents at the end of the period  | 
    
       8,985  | 
    
       66,436  |