Document and Entity Information - shares	9 Months Ended
	Apr. 30, 2016	Jun. 09, 2016
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
Trading Symbol	strp
Document Period End Date	Apr. 30, 2016
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2016
Entity Filer Category	Accelerated Filer
Class A
Entity Common Stock, Shares Outstanding		787,163
Class B
Entity Common Stock, Shares Outstanding		11,390,081