Document and Entity Information	9 Months Ended
	Apr. 30, 2015	Jun. 09, 2015
Entity Registrant Name	Straight Path Communications Inc.
Entity Central Index Key	0001574460
Amendment Flag	false
Current Fiscal Year End Date	--07-31
Document Type	10-Q
Document Period End Date	Apr. 30, 2015
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2015
Entity Filer Category	Accelerated Filer
Class A common stock
Entity Common Stock, Shares Outstanding		787,163
Class B common stock
Entity Common Stock, Shares Outstanding		11,185,786