Derivative Instruments (Tables)

9 Months Ended

Apr. 30, 2017

Derivative Instruments [Abstract]

Schedule of derivative instruments outstanding contracts

Settlement Date	U.S. Dollar Amount		NOK Amount
May 2017		500,000		4,132,484
June 2017*		500,000		4,179,494
July 2017*		500,000		4,179,038

* Entered into pursuant to the Foreign Exchange Agreement with Western Alliance Bank.

Schedule of derivative assets fair value

Asset Derivatives	Balance Sheet Location	April 30, 2017		July 31, 2016
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forward contracts	Other current assets	$	—	$	21

Schedule of derivative liability fair value

Liability Derivatives	Balance Sheet Location	April 30, 2017		July 31, 2016
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forward contracts	Accrued expenses	$	44	$	15

Schedule of derivative instruments on consolidated statements of comprehensive (loss) income

		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	2017			2016		2017			2016
		(in thousands)
Foreign exchange forward contracts	Net (loss) gain resulting from foreign exchange transactions	$	(92	)	$	156	$	(68	)	$	(68	)