The research and development expenses are broken down as follows:
| December 31, | ||||||||||||
| Research and development expenses | 2015 | 2016 | 2017 | |||||||||
| (thousands of Euros) | ||||||||||||
|
Personnel expenses |
13,268 | 32,777 | 37,112 | |||||||||
|
Sub-contracting, collaboration, and consultants |
15,325 | 34,413 | 54,397 | |||||||||
|
Research supplies |
911 | 1,234 | 1,464 | |||||||||
|
Rental |
1,094 | 1,903 | 2,018 | |||||||||
|
Conferences, travel expenses |
1,233 | 2,387 | 2,807 | |||||||||
|
Depreciation and amortization |
1,000 | 1,141 | 2,424 | |||||||||
|
Small equipments and other supplies |
795 | 2,675 | 2,646 | |||||||||
|
Others |
608 | 2,298 | 2,364 | |||||||||
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Total research and development expenses |
34,234 | 78,828 | 105,232 | |||||||||
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