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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2017
Annual Purchase Requirements under Contract

The annual purchase requirements under the contract are as follows:

 

2017    € 2.7 million
2018    € 8.9 million
2019    € 11.6 million
2020    € 15.5 million
2021    € 15.5 million
2022    € 19.4 million
2023    € 19.4 million