The per share price that the individual must pay to acquire shares under the deferred compensation arrangement.

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The total fair value of shares issued during the period under a deferred compensation arrangement.

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Number of shares issued pursuant to the terms of a deferred compensation arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

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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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. 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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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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Number of shares issued under share-based payment arrangement.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of 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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Number of share options (or share units) exercised during the current period.

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Stock-based compensation, Fair Value Assumptions (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Nov. 13, 2020	Nov. 21, 2019	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Risk-free interest rate			0.53%	1.66%
Volatility			94.00%	71.00%
Expected dividend yield			0.00%	0.00%
Expected life			6 years	6 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Share price (in dollars per share)			$ 1.50	$ 2.08
Aggregate intrinsic value of options outstanding			$ 611	$ 2,300
Aggregate intrinsic value of options exercisable			546	$ 1,156
Intrinsic value of options exercised			$ 3
Issuance of common stock (in shares)			400,000	875,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Exercised (in shares)			(15,000)	(86,250)
Weighted average exercise price (in dollars per share)			$ 1.29	$ 1.74
Stock option exercise, stock issued (in shares)				36,410
Stock Options [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Expiry period of option			10 years
Stock Options [Member] \| November 13, 2020 [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Expiry period of option			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Shares issued (in shares)	150,000
Purchase price (in dollars per share)	$ 1.46
Term of vesting			3 years
Aggregate fair value of shares issued	$ 443
Stock Options [Member] \| November 13, 2020 [Member] \| Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Expiry period of option			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Shares issued (in shares)	250,000
Purchase price (in dollars per share)	$ 1.46
Term of vesting			3 years
Aggregate fair value of shares issued	$ 443
Stock Options [Member] \| November 21, 2019 [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Expiry period of option			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Shares issued (in shares)		300,000
Purchase price (in dollars per share)		$ 2.46
Term of vesting			3 years
Aggregate fair value of shares issued		$ 1,361
Stock Options [Member] \| November 21, 2019 [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Expiry period of option			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Shares issued (in shares)		150,000
Purchase price (in dollars per share)		$ 2.46
Term of vesting			3 years
Aggregate fair value of shares issued		$ 1,361
Stock Options [Member] \| November 21, 2019 [Member] \| Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Expiry period of option			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Shares issued (in shares)		425,000
Purchase price (in dollars per share)		$ 2.46
Term of vesting			3 years
Aggregate fair value of shares issued		$ 1,361
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Issuance of common stock (in shares)			0	0