Financial risk management (Tables)

12 Months Ended

Dec. 31, 2017

Financial risk management

Disclosure of categories of material financial assets and liabilities

	December 31,
	2017		2016		2015
	(Euro, in thousands)
Financial assets
Cash and cash equivalents	€	1,151,211	€	973,241	€	340,314
Restricted cash (current and non-current)		1,158		7,668		7,903
Trade receivables		22,133		6,629		1,494
R&D incentives receivables (current and non-current)		75,783		64,342		58,545
Current financial asset from share subscription agreement		—		—		8,371
Available-for-sale financial assets		1,754		2,351		—
Other amounts receivable		5,289		3,078		2,426
Total financial assets	€	1,257,329	€	1,057,309	€	419,052
Financial liabilities
Trade & other payables	€	47,122	€	31,269	€	29,482
Other non-current liabilities		1,597		2,469		2,291
Leasing debts		9		63		115
Tax payable		865		1,022		2,583
Total financial liabilities	€	49,592	€	34,823	€	34,471

Disclosure of aging balance of receivables that are due, but that are still considered collectable

	December 31,
	2017		2016		2015
	(Euro, in thousands)
60 - 90 days			€	170	€	86
90 - 120 days	€	1
more than 120 days			€	54	€	17

Foreign exchange risk

Financial risk management

Disclosure of sensitivity of exchange rate risk

	Year ended December 31,
	2017		2016		2015
Net book value	(Euro, in thousands)
Increase in Euros - U.S. Dollars	€	(21,083)	€	(16,863)	€	506
Increase in Euros - GB Pounds		122		130		164
Increase in Euros - CH Francs		203		165		169
Increase in Euros - HR Kunas		(185)		(95)		(50)
Increase in U.S. Dollars - GB Pounds	€	(831)	€	(913)	€	(907)