Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended		3 Months Ended	0 Months Ended
	Oct. 31, 2013 Maximum [Member]	Oct. 31, 2013 Minimum [Member]	Jun. 30, 2013 Straight Path Spectrum [Member] Former Chief Executive Officer [Member]	May 31, 2011 Straight Path IP [Member]	Oct. 31, 2013 Straight Path IP [Member]	Mar. 15, 2013 Straight Path IP [Member] Former Chief Executive Officer [Member]
Commitments and Contingencies (Textual)
Outstanding common stock of Straight Path IP Percentage				5.00%		5.00%
Compensatory damages						$ 35
Payments to be made from revenue, percentage			50.00%
Maximum aggregate amount to be covered from revenue			$ 4
Recoverable contingency patents allegedly infringed, percentage	40.00%	0.00%
Settlement of litigation, description					Straight Path IP generally pays law firms that represent it in litigation against alleged infringers of its intellectual property rights a percentage of the amounts recovered ranging from 0% to 40% depending on several factors. One of such law firms has the right to 30% of the proceeds from any monetization of the Droplet patent portfolio, as such assets were received in settlement of litigation.