Revenue (Tables)

12 Months Ended

Dec. 31, 2022

Revenue

Schedule of revenue by discipline

	Year ended
	December 31,
	2022		2021		2020
	(in thousands)
Systems	$	692,061	$	454,598	$	293,624
Aftermarket		227,937		207,830		180,936
Total Revenue	$	919,998	$	662,428	$	474,560

(b) Economic Factors Affecting our Revenue: Geographic Breakdown of Revenue

Schedule of revenue by geographic markets

	Year ended
	December 31,
	2022		2021		2020
	(in thousands)
North America	$	143,701	$	48,715	$	50,786
Asia Pacific		673,752		516,105		385,233
Europe		102,545		97,608		38,541
Total Revenue	$	919,998	$	662,428	$	474,560

(c) Recognition of Deferred Revenue from Contract Liabilities

Schedule of Contract liabilities

	Year ended
	December 31,
	2022		2021		2020
	(in thousands)
Balance, beginning of the period	$	68,436	$	23,058	$	29,251
Deferral of revenue		146,674		66,349		17,862
Recognition of deferred revenue		(60,333)		(20,971)		(24,055)
Balance, end of the period	$	154,777	$	68,436	$	23,058