Document and Entity Information	6 Months Ended
	Jan. 31, 2014	Mar. 11, 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	Jan. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Entity Common Stock, Shares Outstanding		177,531,169