Business Segment Information (Details 1) - USD ($) $ in Thousands	Jan. 31, 2016	Jul. 31, 2015
Summary of total assets for the business segments
Total assets:	$ 16,898	$ 20,238
Straight Path Spectrum [Member]
Summary of total assets for the business segments
Total assets:	5,999	5,637
Straight Path IP Group [Member]
Summary of total assets for the business segments
Total assets:	$ 10,899	$ 14,601