Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Statements of Operations [Abstract]
Revenues	$ 159	$ 1,703
Costs and expenses:
Direct cost of revenues	41	782
Research and development	160
Selling, general and administrative	4,235	1,612
Total costs and expenses	4,436	2,394
Loss from operations	(4,277)	(691)
Other income:
Interest income	7	10
Other income	22
Total other income	29	10
Loss before income taxes	(4,248)	(681)
Provision for income taxes	(7)	(6)
Net loss	(4,255)	(687)
Net loss attributable to noncontrolling interests	124	55
Net loss attributable to Straight Path Communications Inc.	$ (4,131)	$ (632)
Loss per share attributable to Straight Path Communications Inc. stockholders:
Basic and diluted	$ (0.34)	$ (0.05)
Weighted-average number of shares used in calculation of loss per share:
Basic and diluted	12,018	11,810