Derivative Instruments (Details)	9 Months Ended
	Apr. 30, 2016 USD ($)	Apr. 30, 2016 NOK
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
October 2016 [Member]
Derivative [Line Items]
Settlement Date	Oct. 31, 2016	Oct. 31, 2016
Amount	$ 500,000	NOK 4,087,318