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Consolidated Statement of Loss and Comprehensive Income (Loss) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Revenues:    
Product and service revenues $ 96,586 $ 121,288
Cost of product and service revenues 66,912 79,688
Gross margin 29,674 41,600
Operating expenses:    
Research and product development 27,039 25,022
General and administrative 14,760 12,602
Sales and marketing 8,068 7,951
Other expense 605 902
Total operating expenses 50,472 46,477
Results from operating activities (20,798) (4,877)
Finance income (loss) and other (449) 1,780
Finance expense (503) (732)
Net finance income (loss) (952) 1,048
Loss on sale of assets (4,049) (1,365)
Equity in earnings (loss) of investment in joint venture and associates (1,154) 201
Impairment charges on intangible assets and property, plant and equipment 0 (1,484)
Loss before income taxes (26,953) (6,477)
Income tax expense (370) (1,571)
Net loss (27,323) (8,048)
Items that will not be reclassified to profit or loss:    
Actuarial gain (loss) on defined benefit plans 305 (206)
Items that will not be reclassified to profit or loss 305 (206)
Items that may be reclassified subsequently to profit or loss:    
Foreign currency translation differences 647 (1,139)
Items that may be reclassified subsequently to profit or loss 647 (1,139)
Other comprehensive income (loss), net of tax 952 (1,345)
Total comprehensive loss $ (26,371) $ (9,393)
Basic and diluted loss per share    
Basic and diluted loss per share (in USD per share) $ (0.15) $ (0.05)
Weighted average number of ordinary shares outstanding (shares) 185,836,596 176,270,305