Document and Entity Information - shares	6 Months Ended
	May 31, 2019	Jul. 08, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Entity Interactive Data Current	Yes
Amendment Flag	false
Document Period End Date	May 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Registrant Name	Trilogy Metals Inc.
Entity Central Index Key	0001543418
Current Fiscal Year End Date	--11-30
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Accelerated Filer
Trading Symbol	TMQ
Security Exchange Name	NYSE
Entity Small Business	true
Entity Emerging Growth Company	false
Title of 12(b) Security	Common Shares
Entity Common Stock, Shares Outstanding		138,905,097