Derivative Instruments (Tables)

6 Months Ended

Jan. 31, 2016

Derivative Instruments [Abstract]

Schedule of derivative instruments outstanding contracts

Settlement Date	U.S. Dollar Amount		NOK Amount
February 2016		800,000		6,772,360
May 2016		1,000,000		8,238,600
July 2016		1,000,000		8,200,000

Schedule of derivative assets fair value

Asset Derivatives	Balance Sheet Location	January 31, 2016		July 31, 2015
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forwards	Other current assets	$	—	$	38

Schedule of derivative liability fair value

Liability Derivatives	Balance Sheet Location	January 31, 2016		July 31, 2015
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forwards	Other current liabilities	$	131	$	39

Schedule of derivative instruments on the consolidated statements of operations

		Amount of Gain (Loss) Recognized on Derivatives
		Three Months Ended January 31,					Six Months Ended January 31,
Derivatives not designated or not qualifying as  hedging instruments	Location of Gain (Loss) Recognized on Derivatives	2016			2015		2016			2015
			(in thousands)
Foreign exchange forwards	Other (expense) income, net	$	(123	)	$	—	$	(225	)	$	—