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Share based compensation - Fair value of RSUs granted estimated using binomial model (Details) - 2021 Option Plan - $ / shares	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Share based compensation
Risk-free rate of return	4.69%	3.79%
Volatility	47.25%	44.95%
Expected dividend yield	0.00%	0.00%
Issuance price (in USD per share)	$ 1.64	$ 8.02
Expected terms	10 years	10 years

X

- 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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- Definition

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

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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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