Annual report pursuant to Section 13 and 15(d)

Commitments - Off Take Sales Agreements (Details)

v3.3.1.900
Commitments - Off Take Sales Agreements (Details)
12 Months Ended
Dec. 31, 2015
item
lb
Commitments [Abstract]  
Number of off-take sales agreements | item 10
2016 Commitment (in pounds) 662,000
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