Business Segment Information (Details Textual) - Segment		1 Months Ended	6 Months Ended
	Feb. 01, 2016	Nov. 01, 2015	Jan. 31, 2016
Business Segment Information (Textual)
Reportable Segments		3
Employment expenses of Chief Technology Officer	100.00%
Straight Path IP Group [Member]
Business Segment Information (Textual)
Percentage of general and administrative expenses	20.00%		80.00%
Employment expenses of Chief Technology Officer	20.00%
Straight Path Spectrum [Member]
Business Segment Information (Textual)
Percentage of general and administrative expenses	80.00%		20.00%
Employment expenses of Chief Technology Officer	20.00%
Employee Expenses Related To Another Employee	20.00%
Straight Path Ventures [Member]
Business Segment Information (Textual)
Employment expenses of Chief Technology Officer	60.00%
Employee Expenses Related To Another Employee	80.00%