Document and Entity Information	3 Months Ended
	Oct. 31, 2013	Dec. 10, 2013 Common Class A [Member]	Dec. 10, 2013 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	Oct. 31, 2013
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2014
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		787,163	10,974,934