Derivative Instruments (Details)	6 Months Ended
	Jan. 31, 2016 USD ($)	Jan. 31, 2016 NOK
February 2016 [Member]
Derivative [Line Items]
Settlement Date	Feb. 29, 2016	Feb. 29, 2016
Amount	$ 800,000	NOK 6,772,360
May 2016 [Member]
Derivative [Line Items]
Settlement Date	May 31, 2016	May 31, 2016
Amount	$ 1,000,000	NOK 8,238,600
July 2016 [Member]
Derivative [Line Items]
Settlement Date	Jul. 31, 2016	Jul. 31, 2016
Amount	$ 1,000,000	NOK 8,200,000