Document and Entity Information	6 Months Ended
	Jan. 31, 2015	Mar. 12, 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	Jan. 31, 2015
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2015
Entity Filer Category	Accelerated Filer
Common Class A [Member]
Entity Common Stock, Shares Outstanding		787,163
Common Class B [Member]
Entity Common Stock, Shares Outstanding		11,192,091