Grants and other liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Grants and other liabilities [Abstract]

Grants and other non-current liabilities

	Balance as of December 31,
	2017		2016
Grants		1,225,877		1,297,755
Other liabilities		410,183		314,290
Grant and other non-current liabilities		1,636,060		1,612,045