Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Remaining Annual Purchase Requirements under Contract

As of June 30, 2018, the remaining annual purchase requirements under the contract are as follows:

2018	€	4.4 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	$	302,000
2019		947,000
2020		976,000
2021		1,005,000
2022		1,035,000
Thereafter		88,000
	$	4,353,000