Derivative Instruments (Tables)

9 Months Ended

Apr. 30, 2016

Derivative Instruments [Abstract]

Schedule of derivative instruments outstanding contracts

Settlement Date	U.S. Dollar Amount		NOK Amount
May 2016		1,000,000		8,238,600
July 2016		1,000,000		8,200,000
October 2016		500,000		4,087,318

Schedule of derivative assets fair value

Asset Derivatives	Balance Sheet Location	April 30, 2016		July 31, 2015
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forward contracts	Other current assets	$	46	$	38

Schedule of derivative liability fair value

Liability Derivatives	Balance Sheet Location	April 30, 2016		July 31, 2015
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forward contracts	Other current liabilities	$	—	$	39

Schedule of derivative instruments on the consolidated statements of operations

		Amount of Gain (Loss) Recognized on Derivatives
		Three Months Ended April 30,				Nine Months Ended April 30,
Derivatives not designated or not qualifying as  hedging instruments	Location of Gain (Loss) Recognized on Derivatives	2016		2015		2016			2015
		(in thousands)
Foreign exchange forward contracts	Other income (expense), net	$	156	$	—	$	(68	)	$	—