Share-based payments (Tables)

12 Months Ended

Dec. 31, 2021

Text Block [Abstract]

Summary of the Number and Weighted Average Exercise Prices Movements in Stock Options

The following table illustrates the number and weighted average exercise prices of, and movements in, stock options during the year:

				Weighted				Weighted
				average				average
	2021			exercise price		2020		exercise price
	Number stock options			€		Number stock options		€
Outstanding January 1,		1,465,295			1.85		392,850		0.01
Granted		1,144,000			15.80		1,072,445		2.53
Exercised		(34,000	)		2.38		—		—
Forfeited		(105,000	)		16.67		—		—
Outstanding December 31,		2,470,295			9.18		1,465,295		1.85

Summary of the Number and Weighted Average Purchase Prices Movements in RSU

The following table illustrates the number and weighted average purchase prices of, and movements in, RSUs during the year:

				Weighted				Weighted
				average				average
	2021			purchase price		2020		purchase price
	Number RSUs			€		Number RSUs		€
Outstanding January 1,		153,595			—		25,295	0.01
Granted		175,991			—		128,300	0.00
Vested		(57,372	)		—		—		—
Forfeited		(12,500	)		—		—		—
Outstanding December 31,		259,714			—		153,595		0.00

Summary of Fair Value Per Ordinary Share Pre-IPO at the Grant Based Upon Equity Value

The inputs used in the measurement of the fair value per ordinary share pre-IPO at the grant/measurement date based upon the total equity value was as follows:

	January 1,
	2021
Expected volatility (%)		85	%
Expected life (years)		6.0
Risk-free interest rate (%)		-0.6	%
Expected dividend yield	$	—

Summary of Fair Value Per Option at Each Grant/Measurements Date Using the Black-Scholes Formula

The input used in the measurement of the fair value per option at each grant/measurements date using the Black-Scholes formula (including the related number of options and the fair value of the options) were as follows:

	July 1,			June 25,			June 25,			February 4,			January 1,
	2021			2021			2021			2021			2021
				Option 1			Option 2
Number of options		150,000			14,000			88,000			873,000			107,000
Fair value of the options	€	10.50		€	10.90		€	13.73		€	11.88		€	5.06
Fair value of the ordinary shares	€	14.67		€	15.46		€	15.46		€	16.69		€	7.25
Exercise price	€	14.67		€	16.74		€	2.38		€	16.69		€	7.25
Expected volatility (%)		85	%		85	%		85	%		85	%		85	%
Expected life (years)		6.1			6.1			4.6			6.1			6.0
Risk-free interest rate (%)		1.2	%		1.2	%		-0.5	%		0.8	%		-0.6	%
Expected dividend yield		—			—			—			—			—