Combined and Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Statements of Operations [Abstract]
Revenues	$ 13,240	$ 4,796	$ 1,130
Costs and expenses:
Direct cost of revenues	6,043	2,487	630
Selling, general and administrative	6,931	3,001	3,115
Total costs and expenses	12,974	5,488	3,745
Income (loss) from operations before items listed below	$ 266	$ (692)	(2,615)
Gain on settlement of rights in wireless spectrum			150
Loss on settlement of Straight Path Spectrum legal proceedings			(1,150)
Loss from operations	$ 266	$ (692)	(3,615)
Other income:
Interest income	38	$ 22	$ 11
Other income	$ 334
Income from IDT Corporation payments of liabilities		$ 386
Total other income	$ 372	408	$ 11
Income (loss) before income taxes	638	(284)	(3,604)
Provision for (income taxes) income tax benefits	(2,714)	2,353	(8)
Net (loss) income	(2,076)	2,069	(3,612)
Net loss (income) attributable to noncontrolling interests	111	(32)	399
Net (loss) income attributable to Straight Path Communications Inc.	$ (1,965)	$ 2,037	$ (3,213)
Earnings (loss) per share attributable to Straight Path Communications Inc. stockholders:
Basic	$ (0.17)	$ 0.19	$ (0.31)
Diluted	$ (0.17)	$ 0.18	$ (0.31)
Weighted-average number of shares used in calculation of earnings (loss) per share:
Basic	11,457	10,667	10,504
Diluted	11,457	11,267	10,504