Net (loss) income per share - Basic and diluted weighted average shares outstanding (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net (loss) income	$ (25,901)	$ 17,624	$ 75,935	$ (22,782)
Denominator for basic net (loss) income per share:
Weighted average shares outstanding-basic	43,864,838	38,507,542	40,962,116	38,292,497
Denominator for diluted net (loss) income per share:
Weighted average shares outstanding-basic	43,864,838	38,507,542	40,962,116	38,292,497
Common stock options and restricted stock units		1,062,852	1,648,608
Weighted average shares outstanding-diluted	43,864,838	39,570,394	42,610,724	38,292,497