Other Operating Gains (Loss), Net - Schedule of Other Operating Gains Loss Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2013		Oct. 31, 2012
Other Operating Gains (Loss) and Other (Expense) Income, Net [Abstract]
Telecom Platform Services-gain (loss) related to legal matters	$ 300		$ (350)
All Other-gain on insurance claim (a)	571	[1]		[1]
All Other-other	67
Corporate-loss related to settlement (b)	(79)	[2]		[2]
TOTAL	$ 571	[1]

[1] In the three months ended October 31, 2013, the Company received proceeds from insurance of $0.6 million related to water damage to portions of the Company's building and improvements at 520 Broad Street, Newark, New Jersey. The damage occurred in a prior period. The Company recorded a gain of $0.6 million from this insurance claim.

[2] (b) In the three months ended October 31, 2013, the Company incurred a loss of $0.1 million in connection with the June 2013 settlement of outstanding claims and disputes with the former Chief Executive Officer of Straight Path Spectrum, Inc. ("the Former SPSI CEO"), and parties related to the Former SPSI CEO. In the fourth quarter of fiscal 2013, Straight Path Spectrum, Inc. paid $1.5 million to the Former SPSI CEO in connection with the settlement.