Document and Entity Information - shares	3 Months Ended
	Oct. 31, 2019	Jun. 22, 2020
Document and Entity Information [Abstract]
Entity Registrant Name	NORTHERN MINERALS & EXPLORATION LTD.
Entity Central Index Key	0001415744
Amendment Flag	false
Current Fiscal Year End Date	--07-31
Document Type	10-Q
Document Period End Date	Oct. 31, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		59,078,479
Entity Interactive Data Current	Yes
Entity Incorporation State Country Code	NV
Entity File Number	333-146934