Consolidated cash flow statements
  | 
      Year ended 31 December  | 
      
  | 
    |
(thousands of €)  | 
      2015  | 
      2014  | 
      Notes  | 
    
Cash and cash equivalents at beginning of year  | 
      187,712  | 
      138,175  | 
      |
  | 
      
  | 
      
  | 
      
  | 
    
Net income / loss (–)  | 
      (118,410)  | 
      33,211  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Adjustments for:  | 
      
  | 
      
  | 
      
  | 
    
Tax income (–) / expenses  | 
      (1,218)  | 
      2,337  | 
      |
Other net financial income  | 
      (448)  | 
      (1,841)  | 
      |
Fair value re-measurement of share subscription agreement  | 
      30,632  | 
      –  | 
      |
Depreciation of property, plant and equipment  | 
      2,372  | 
      3,582  | 
      |
Amortization of intangible fixed assets  | 
      1,030  | 
      1,067  | 
      |
Net realized loss on foreign exchange transactions  | 
      (398)  | 
      (261)  | 
      
  | 
    
Share-based compensation  | 
      5,036  | 
      2,952  | 
      |
Increase / decrease (–) in provisions  | 
      (125)  | 
      27  | 
      |
Increase in pension liabilities  | 
      30  | 
      409  | 
      |
Gain on sale of fixed assets  | 
      (62)  | 
      
  | 
      
  | 
    
Gain on sale of service division  | 
      
  | 
      (67,508)  | 
      |
  | 
      
  | 
      
  | 
      
  | 
    
Operating cash flows before movements in working capital  | 
      (81,560)  | 
      (26,025)  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Increase in inventories  | 
      (44)  | 
      (32)  | 
      
  | 
    
Increase in receivables  | 
      (7,220)  | 
      (10,110)  | 
      |
Decrease in payables  | 
      (26,728)  | 
      (40,311)  | 
      |
  | 
      
  | 
      
  | 
      
  | 
    
Cash used in operations  | 
      (115,553)  | 
      (76,479)  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Interest paid  | 
      (49)  | 
      (113)  | 
      
  | 
    
Interest received  | 
      1,106  | 
      951  | 
      
  | 
    
Income taxes paid (–) / received  | 
      (94)  | 
      86  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Net cash flows used in operating activities  | 
      (114,590)  | 
      (75,555)  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Purchase of property, plant and equipment  | 
      (6,100)  | 
      (2,061)  | 
      |
Purchase of and expenditure in intangible fixed assets  | 
      (565)  | 
      (743)  | 
      |
Proceeds from disposal of property, plant and equipment  | 
      110  | 
      45  | 
      |
Disposals of subsidiaries, net of cash disposed  | 
      
  | 
      130,787  | 
      |
Increase (–) / decrease in restricted cash  | 
      2,258  | 
      (7,422)  | 
      |
  | 
      
  | 
      
  | 
      
  | 
    
Net cash flows generated / used (–) in investing activities  | 
      (4,297)  | 
      120,606  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Repayment of obligations under finance leases and other debts  | 
      (43)  | 
      (216)  | 
      |
Proceeds from capital and share premium increases, net of issue costs  | 
      271,413  | 
      4,430  | 
      |
  | 
      
  | 
      
  | 
      
  | 
    
Net cash flows generated in financing activities  | 
      271,370  | 
      4,214  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Effect of exchange rate differences on cash and cash equivalents  | 
      118  | 
      271  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Increase in cash and cash equivalents  | 
      152,601  | 
      49,537  | 
      
  | 
    
  | 
      
  | 
      
  | 
      
  | 
    
Cash and cash equivalents at end of year  | 
      340,314  | 
      187,712  | 
      
  | 
    
