Derivatives used as Hedging Instruments (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) $ / Ounce-oz	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) $ / Ounce-oz	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
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 | $	$ 206,239	$ 0	$ 115,395	$ 0
Derivative Liability | $	$ 115,395		$ 115,395		$ 0