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STATEMENTS OF INCOME (LOSS) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenues and other income |  |  |
Revenues | € 372 | € 6,998 | € 3,197
Other income | 4,891 | 4,293 | 4,182
Total revenues and other income | 5,263 | 11,291 | 7,379
Research and development expenses | (23,717) | (33,791) | (31,758)
Marketing - Business development expenses | (563) | (249) | (225)
General and administrative expenses | (8,499) | (6,088) | (6,045)
Other operating income (expenses) | (2,202) | (1,475) | (2,255)
Operating profit (loss) | (29,718) | (30,312) | (32,903)
Financial income | 2,057 | 175 | 142
Financial expenses | (5,959) | (81) | (253)
Financial income (loss) | (3,902) | 93 | (111)
Income tax |  |  |
Net loss for the period | € (33,619) | € (30,218) | € (33,014)
Basic / diluted loss per share (euros/share) | € (0.99) | € (1.28) | € (1.61)
Weighted average number of outstanding shares used for computing basic/diluted loss per share | 33,874,751 | 23,519,897 | 20,540,979

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