Derivative Instruments (Tables)

9 Months Ended

Apr. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of outstanding foreign exchange contracts

Settlement Date	U.S. Dollar Amount		NOK Amount
May-19	$	500,000		4,107,440
Jun-19		500,000		4,102,240
Jul-19		500,000		4,097,140
Aug-19		500,000		4,091,590
Total	$	2,000,000		16,398,410

Schedule of fair value of outstanding derivative instruments

Derivatives Instruments	Balance Sheet Location	April 30, 2019		July 31, 2018
		(in thousands)
Derivatives not designated or not qualifying as hedging instruments:
Foreign exchange forward contracts	Accrued expenses	$	96	$	41

Schedule of derivative instruments on consolidated statements of comprehensive loss

		Amount of Loss Recognized on Derivatives
Derivatives not designated or	Statement of	Three Months Ended				Nine Months Ended
not qualifying as hedging	Comprehensive Loss	April 30,				April 30,
instruments	Location	2019		2018		2019		2018
		(in thousands)				(in thousands)
Foreign exchange forward contracts	Net loss resulting from foreign exchange transactions	$	80	$	-	$	254	$	1