Details of operating expenses by nature
| For the year ended December 31, | ||||||||||||
| 2015 | 2016 | 2017 | ||||||||||
| $ in thousands | ||||||||||||
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Royalty expenses |
(2,746 | ) | (1,777 | ) | (2,620 | ) | ||||||
| For the year ended December 31, | ||||||||||||
| Research and development expenses | 2015 | 2016 | 2017 | |||||||||
| $ in thousands | ||||||||||||
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Wages and salaries |
(10,151 | ) | (11,924 | ) | (12,986 | ) | ||||||
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Social charges on free shares and stock option grants |
(8,626 | ) | (3,851 | ) | (1,088 | ) | ||||||
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Non-cash stock based compensation expense |
(20,563 | ) | (33,207 | ) | (23,832 | ) | ||||||
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Personnel expenses |
(39,341 | ) | (48,982 | ) | (37,906 | ) | ||||||
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Purchases and external expenses |
(16,920 | ) | (27,720 | ) | (38,458 | ) | ||||||
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Other |
(1,893 | ) | (1,756 | ) | (2,863 | ) | ||||||
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Total research and development expenses |
(58,154 | ) | (78,458 | ) | (79,227 | ) | ||||||
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| For the year ended December 31, | ||||||||||||
| Selling, general and administrative expenses | 2015 | 2016 | 2017 | |||||||||
| $ in thousands | ||||||||||||
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Wages and salaries |
(3,959 | ) | (4,978 | ) | (7,019 | ) | ||||||
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Social charges on free shares and stock option grants |
(4,937 | ) | (3,130 | ) | (881 | ) | ||||||
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Non-cash stock based compensation expense |
(12,839 | ) | (25,415 | ) | (26,586 | ) | ||||||
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Personnel expenses |
(21,735 | ) | (33,523 | ) | (34,486 | ) | ||||||
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Purchases and external expenses |
(6,765 | ) | (8,854 | ) | (9,138 | ) | ||||||
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Other |
(1,723 | ) | (1,035 | ) | (1,126 | ) | ||||||
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Total selling, general and administrative expenses |
(30,223 | ) | (43,413 | ) | (44,750 | ) | ||||||
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| For the year ended December 31, | ||||||||||||
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Personnel expenses |
2015 | 2016 | 2017 | |||||||||
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| $ in thousands | ||||||||||||
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Wages and salaries |
(14,110 | ) | (16,902 | ) | (20,005 | ) | ||||||
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Social charges on free shares and stock option grants |
(13,564 | ) | (6,981 | ) | (1,969 | ) | ||||||
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Non-cash stock based compensation expense |
(33,402 | ) | (58,622 | ) | (50,418 | ) | ||||||
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Total personnel expenses |
(61,076 | ) | (82,505 | ) | (72,392 | ) | ||||||
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