Annual report pursuant to Section 13 and 15(d)

Commitments - Off Take Sales Agreements (Details)

v3.6.0.2
Commitments - Off Take Sales Agreements (Details)
12 Months Ended
Dec. 31, 2016
lb
Commitments [Abstract]  
2017 Commitment (in pounds) 600,000
2018 Commitment (in pounds) 500,000
2019 Commitment (in pounds) 600,000
2020 Commitment (in pounds) 450,000
2021 Commitment (in pounds) 250,000