Business Segment Information (Details Textual) - Segments	1 Months Ended		12 Months Ended
	Feb. 29, 2016	Jan. 31, 2016	Jul. 31, 2016
Business Segment Information (Textual)
Reportable segments			3
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%
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%
Employee expenses related to another employee	20.00%
Straight Path Ventures [Member]
Business Segment Information (Textual)
Percentage of general and administrative expenses	100.00%
Employment expenses of Chief Technology Officer	60.00%