Stock-Based Compensation (Details Textual) (USD $)	12 Months Ended		1 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended		12 Months Ended		1 Months Ended	0 Months Ended		12 Months Ended		0 Months Ended						1 Months Ended	0 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Sep. 24, 2012 IDT[Member]	Jul. 31, 2013 IDT[Member]	Apr. 15, 2013 Straight Path IP Group [Member]	May 31, 2014 Straight Path IP Group [Member]	May 31, 2013 Straight Path IP Group [Member]	Jul. 31, 2013 Straight Path IP Group [Member]	Jul. 31, 2012 Straight Path IP Group [Member]	May 31, 2011 Straight Path IP Group [Member] Former CEO [Member]	Aug. 06, 2013 Common Class B [Member]	Aug. 02, 2013 Common Class B [Member]	Jul. 31, 2014 Common Class B [Member]	Jul. 31, 2013 Common Class B [Member]	Aug. 01, 2014 Common Class B [Member] Subsequent Event [Member]	Aug. 02, 2013 Common Class B [Member] Jonathan Rand [Member]	Aug. 01, 2014 Common Class B [Member] Jonathan Rand [Member] Subsequent Event [Member]	Aug. 02, 2013 Common Class B [Member] Davidi Jonas [Member]	Aug. 01, 2014 Common Class B [Member] Davidi Jonas [Member] Subsequent Event [Member]	Aug. 02, 2013 Common Class B [Member] Non Employee Director [Member]	Jan. 31, 2014 Common Class B [Member] Non Employee Director [Member]	Aug. 01, 2014 Common Class B [Member] Jerry Pi [Member] Subsequent Event [Member]
Stock-Based Compensation (Textual)
Common stock shares reserved														678,532
Common stock options purchase				641,567										32,155
Common stock shares outstanding option, percentage				10.00%
Exercise option price per share														$ 5.67
Number of share granted for service											10,100		5,500			38,268	52,000	229,608	71,000	3,750	24,000	60,000
Common stock with aggregate fair value											$ 50,000	$ 1,500,000	$ 54,000		$ 1,200,000					$ 21,263	$ 197,000	$ 573,000
Restricted common stock shares description															Both grants of restricted shares will vest as to approximately one-third of the granted shares on each of February 1, 2015, 2016 and 2017.							These restricted shares will vest as to one-third of the granted shares on each of September 1, 2015, 2016 and 2017.
Estimated value of grant option Srtaight Path IP					13,318					200,000
Stock option purchase of consultant, percentage					0.50%					5.00%
Consultant stock option vests percentage					33.20%	33.40%	33.40%
Board of Directors approved a grant of equity percentage			10.00%
Grant options equity outstanding of Srtaight Path IP										400,000
Expected volatility					51.00%					49.00%
Discount rate					0.80%					2.20%
Expected term					4 years					6 years
Stock-based compensation	12,000		662,000					13,000	52,000
Intrinsic value of options exercised	$ 12,104
Closing stock price	$ 9.87