Percentage of annual retainer elected for stock awards.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received.

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Description of common stock conversion feature. Includes, but is not limited to, conversion price; conversion right; timing of right; terms, event or change in circumstance causing contingency to be met or adjustment to conversion price or number of shares; manner of settlement upon conversion; and method of settlement.

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Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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The cash inflow from the additional capital contribution to the entity.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Amount of noncash expense for share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Per share or per unit amount of equity securities issued.

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Number of new stock issued during the period.

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Share capital - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended		12 Months Ended
	Apr. 30, 2012 shares	Apr. 30, 2020 shares	Apr. 20, 2018 USD ($) $ / shares shares	Nov. 30, 2020 USD ($) $ / shares shares	Nov. 30, 2019 USD ($) shares	Nov. 30, 2018 USD ($) shares	Nov. 30, 2020 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation \| $				$ (3,564)	$ (3,845)	$ (1,441)
Non-vested stock options outstanding				8,647,500
Weighted average exercise price options outstanding \| $ / shares							$ 2.39
Stock option expense not yet recognized \| $				$ 1,000
Period for recognition of stock compensation expense				2 years
Aggregate intrinsic value, vested options \| $				$ 2,400	7,200	12,200
Aggregate intrinsic value, options exercised \| $				$ 2,600	$ 2,600	500
Bought deal financing \| $						$ 28,750
Bank commissions, legal fees, stock exchange and other fees \| $			$ 1,800
Net proceeds from bought-deal financing \| $			26,900
Share capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock committed for issuance				144,137,850	140,427,761	131,585,612
Bought deal financing \| $			$ 28,700			$ 28,750
Bought deal financing (Shares)			24,784,482			24,784,482
Bought-deal financing, price per share \| $ / shares			$ 1.16
Nonvested Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested stock options outstanding				2,493,337
Weighted average exercise price options outstanding \| $ / shares				$ 2.15
NovaGold DSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock committed for issuance				11,927
Granted units				83,775
Percentage of annual retainer elected for stock awards				50.00%
NovaGold Arrangement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Terms of Conversion	On April 30, 2012, under the NovaGold Arrangement, Trilogy committed to issue common shares to satisfy holders of NovaGold deferred share units (“NovaGold DSUs”), once vested, on record as of the close of business April 27, 2012. When vested, Trilogy committed to deliver one common share to the holder for every six shares of NovaGold the holder is entitled to receive, rounded down to the nearest whole number.
Number of shares, conversion	6
Exchangable Trilogy shares outstanding				1,988
Number of RSU's
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				412,501
Granted units				200,000
Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation \| $				$ 500	$ 900	$ 600
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted units		200,000
Stock Option.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation \| $				$ 3,100	$ 2,900	$ 800