| Total assets | 292.3M | 277.1M | 216.0M | 200.0M | 
                
                        | Current assets | 119.1M | 134.9M | 110.9M | 104.5M | 
                
                        | Cash | 2.6M | 4.1M | 3.4M | 1.5M | 
                
                        | Cash equivalents | 4M | — | — | — | 
                
                        | Cash and cash equivalents | 6.6M | 4.1M | 3.4M | 1.5M | 
                
                        | Other short term investments | 22.0M | 7.7M | 5.9M | 13.0M | 
                
                        | Accounts receivable | 41.5M | 60.0M | 40.0M | 16.1M | 
                
                        | Other receivables | 1.1M | 1.3M | 444K | 2.0M | 
                
                        | Inventory | 43.1M | 54.8M | 55.2M | 66.6M | 
                
                        | Prepaid assets | 720K | 1.4M | 2.0M | 1.7M | 
                
                        | Restricted cash | 4.2M | 4.7M | 3.4M | 3.6M | 
                
                        | Assets held for sale | 0 | 241K | 241K | 0 | 
                
                        | Hedging assets | — | — | — | — | 
                
                        | Other current assets | 167K | 1.0M | 168K | 1K | 
                
                        | Non current assets | 173.2M | 142.2M | 105.1M | 95.4M | 
                
                        | Properties | 440K | 440K | 440K | 440K | 
                
                        | Land and improvements | 18.9M | 18.9M | 18.9M | 18.9M | 
                
                        | Machinery furniture equipment | 70.9M | 69.2M | 65.8M | 65.6M | 
                
                        | Construction in progress | 103.5M | 57.2M | 17.2M | 413K | 
                
                        | Leases | — | — | — | — | 
                
                        | Accumulated depreciation | -54.8M | -50.5M | -46.5M | -44.4M | 
                
                        | Goodwill | 277K | 686K | 1.0M | 0 | 
                
                        | Investment properties | — | — | — | — | 
                
                        | Financial assets | — | — | — | — | 
                
                        | Intangible assets | 277K | 686K | 1.0M | — | 
                
                        | Investments and advances | — | — | — | — | 
                
                        | Other non current assets | 1K | 1K | 3K | 2K | 
                
                        | Total liabilities | 96.1M | 96.6M | 45.8M | 40.9M | 
                
                        | Current liabilities | 50.2M | 76.2M | 42.2M | 32.1M | 
                
                        | Accounts payable | 14.4M | 15.8M | 15.2M | 17.5M | 
                
                        | Accrued expenses | — | — | — | — | 
                
                        | Short term debt | 14.2M | 4.2M | 5.3M | 0 | 
                
                        | Deferred revenue | — | — | — | — | 
                
                        | Tax payable | 608K | 0 | 479K | 232K | 
                
                        | Pensions | 1.6M | 1.8M | 1.2M | 0 | 
                
                        | Other current liabilities | 3.6M | 6.9M | -1K | 1K | 
                
                        | Non current liabilities | 46.0M | 20.4M | 3.6M | 8.8M | 
                
                        | Long term provisions | 474K | 436K | — | — | 
                
                        | Long term debt | 41.4M | 16.2M | 0 | 4.7M | 
                
                        | Provision for risks and charges | — | — | — | — | 
                
                        | Deferred liabilities | 4.1M | 3.8M | 3.6M | 3.8M | 
                
                        | Derivative product liabilities | — | — | — | — | 
                
                        | Other non current liabilities | 1K | 1K | — | 258K | 
                
                        | Shareholders equity |  |  |  |  | 
                
                        | Common stock | 45.4M | 45.4M | 45.4M | 45.4M | 
                
                        | Retained earnings | 147.3M | 131.6M | 121.3M | 110.2M | 
                
                        | Other shareholders equity | — | — | — | — | 
                
                        | Total shareholders equity | 196.1M | 180.4M | 170.2M | 159.1M | 
                
                        | Additional paid in capital | — | — | — | — | 
                
                        | Treasury stock | — | — | — | — | 
                
                        | Minority interest | — | — | — | — |