Concentration of Customers (Tables)

9 Months Ended

Apr. 30, 2016

Concentration of Customers [Abstract]

Schedule of revenues from transactions with single customer

	Three Months Ended April 30,				Nine Months Ended April 30,
	2016		2015		2016		2015
	(in thousands)
Customer 1	$	41	$	41	$	124	$	124
Customer 2		21		21		64		66
Customer 3		15		10		43		29
Customer 4		14		N/A		N/A		N/A