Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Revenue

Schedule of revenue by discipline

	Year ended
	December 31,
	2023		2022		2021
	(in thousands)
Systems	$	883,604	$	692,061	$	454,598
Aftermarket		247,000		227,937		207,830
Total Revenue	$	1,130,604	$	919,998	$	662,428

Schedule of revenue by geographic markets

	Year ended
	December 31,
	2023		2022		2021
	(in thousands)
North America	$	174,810	$	143,701	$	48,715
Asia Pacific		811,308		673,752		516,105
Europe		144,486		102,545		97,608
Total Revenue	$	1,130,604	$	919,998	$	662,428

Schedule of Contract liabilities

	Year ended
	December 31,
	2023		2022		2021
	(in thousands)
Balance, beginning of the period	$	154,777	$	68,436	$	23,058
Deferral of revenue		185,688		146,674		66,349
Recognition of deferred revenue		(129,580)		(60,333)		(20,971)
Balance, end of the period	$	210,885	$	154,777	$	68,436