Document and Entity Information	3 Months Ended
	Oct. 31, 2014	Dec. 05, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	Lightlake Therapeutics Inc.
Document Type	10-Q
Current Fiscal Year End Date	--07-31
Amendment Flag	false
Entity Central Index Key	0001385508
Entity Filer Category	Smaller Reporting Company
Document Period End Date	Oct. 31, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Common Stock, Shares Outstanding		182,010,212