Document and Entity Information	9 Months Ended
	Apr. 30, 2014	Jun. 10, 2014 Common Class A [Member]	Jun. 10, 2014 Common Class B [Member]
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, 2014
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2014
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		787,163	11,007,934