Equity-based compensation - Option activity (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 02, 2022 USD ($) $ / shares shares
Number of options
Beginning balance (in shares) | shares	8,364,000
Granted (in shares) | shares	2,099,000
Exercised (in shares) | shares	(227,000)
Forfeited/canceled (in shares) | shares	(295,000)
Ending balance (in shares) | shares	9,941,000
Exercisable and vested (in shares) | shares	4,498,000
Weighted-average exercise price
Beginning balance (in dollars per share) | $ / shares	$ 11.16
Granted (in dollars per share) | $ / shares	12.66
Exercised (in dollars per share) | $ / shares	8.73
Forfeited/canceled (in dollars per share) | $ / shares	13.09
Ending balance (in dollars per share) | $ / shares	11.48
Exercisable and vested (in dollars per share) | $ / shares	$ 9.58
Outstanding, weighted average remaining contractual term	8 years 2 months 15 days
Exercisable and vested (in years)	6 years 10 months 9 days
Options outstanding, Aggregate intrinsic value | $	$ 22,184
Exercisable and vested | $	$ 18,262