Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments And Contingencies Disclosure [Abstract]

Annual Purchase Requirements under Contract

The annual purchase requirements under the contract are as follows:

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

Schedule of Future Minimum Lease Payments

Future minimum lease payments are as follows:

2018	$	522,000
2019		947,000
2020		976,000
2021		1,005,000
2022		1,035,000
Thereafter		88,000
	$	4,573,000