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STOCK BASED COMPENSATION, Stock Option, weighted-average assumptions (Details) - $ / shares	1 Months Ended					12 Months Ended
	Jul. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Jan. 31, 2021	Aug. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employees
STOCK BASED COMPENSATION
Weighted-average grant-date fair values of stock options with a service condition granted						$ 3.30	$ 1.31	$ 1.27
Expected volatility	75.00%	75.00%	75.00%	65.00%	75.00%
Risk-free interest rate	0.72%	0.93%	0.72%	0.18%	0.22%
Probability weighted time to exit	3 years	5 years	5 years	3 years	4 years
Expected dividend yield	0.00%	0.00%	0.00%	0.00%	0.00%
Third-party consultant
STOCK BASED COMPENSATION
Weighted-average grant-date fair values of stock options with a service condition granted						$ 2.20	$ 1.96
Expected volatility						75.00%	75.00%
Risk-free interest rate						0.72%	0.93%
Probability weighted time to exit						3 years	5 years
Expected dividend yield						0.00%	0.00%

X

- Definition

The weighted average grant-date fair value of options granted with service condition during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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

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