Derivatives used as Hedging Instruments (Details Textual)	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($) $ / Ounce-oz	Jun. 30, 2016 USD ($) $ / Ounce-oz	Dec. 31, 2015 USD ($)
Derivative [Line Items]
Derivative, Average Floor Price | $ / Ounce-oz	1,100	1,100
Derivative, Average Cap Price | $ / Ounce-oz	1,320	1,320
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax | $	$ 215,365	$ 321,634
Derivative Liability | $	$ 321,634	$ 321,634	$ 0