Annual report pursuant to Section 13 and 15(d)

Commitments - Off Take Sales Agreements (Details)

v3.8.0.1
Commitments - Off Take Sales Agreements (Details)
12 Months Ended
Dec. 31, 2017
lb
Commitments [Abstract]  
2018 Commitment (in pounds) 470,000
2019 Commitment (in pounds) 540,000
2020 Commitment (in pounds) 390,000
2021 Commitment (in pounds) 190,000