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Investment in Ambler Metals LLC - Financial information (Details) - USD ($) $ in Thousands	10 Months Ended	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2018	Feb. 11, 2020
The carrying value of Trilogy's 50% investment in Ambler Metals LLC
Share of loss on equity investment from February 11, 2020 to November 30, 2020		$ (2,855)
November 30, 2020, equity method investment	$ 173,145	173,145
Ambler Metals LLC's Balance Sheet and net loss
Total Assets	185,265	185,265	$ 51,617
Amortization		91	211	$ 160
General and administrative expense		1,650	$ 1,838	$ 1,532
Ambler Metals LLC
The carrying value of Trilogy's 50% investment in Ambler Metals LLC
February 11, 2020, fair value ascribed to Ambler Metals LLC interest					$ 176,000
Share of loss on equity investment from February 11, 2020 to November 30, 2020	(2,855)
November 30, 2020, equity method investment	173,145	173,145
Ambler Metals LLC's Balance Sheet and net loss
Current assets: Cash, deposits and prepaid expenses	82,226	82,226
Non - current assets: Property, equipment and mineral properties	31,287	31,287
Loan receivable from South32	58,478	58,478
Current liabilities: Accounts payable and accrued liabilities	(1,445)	(1,445)
Non - current liabilities: Lease obligation	(51)	(51)
Total Assets	170,495	170,495
South32 \| Ambler Metals LLC
The carrying value of Trilogy's 50% investment in Ambler Metals LLC
Share of loss on equity investment from February 11, 2020 to November 30, 2020	$ (5,700)
Ambler Metals LLC's Balance Sheet and net loss
Amortization		95
Mineral properties expense		3,619
General and administrative expense		3,177
Interest income		(1,181)
Comprehensive loss		$ 5,710