Document and Entity Information - USD ($)	12 Months Ended
	Jul. 31, 2018	Nov. 09, 2018	Jan. 31, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	NORTHERN MINERALS & EXPLORATION LTD.
Entity Central Index Key	0001415744
Trading Symbol	NMEX
Amendment Flag	false
Current Fiscal Year End Date	--07-31
Document Type	10-K
Document Period End Date	Jul. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding		48,436,818