REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Disaggregated Revenue Information

The Company assesses revenues based upon the nature or type of goods or services it provides and the geographic location of the related businesses. The following tables present disaggregated revenue information:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Single wafer cleaning, Tahoe and semi-critical cleaning equipment	$	112,528	$	72,583	$	149,142	$	98,616
ECP (front-end and packaging), furnace and other technologies	19,117		20,500		45,715		32,748
Advanced packaging (excluding ECP), services & spares	12,932		11,312		23,976		15,217
Total Revenue By Product Category	$	144,577	$	104,395	$	218,833	$	146,581
Wet-cleaning and other front-end processing tools	$	122,415	$	79,553	$	178,797	$	111,254
Advanced packaging, other processing tools, services and spares	22,162		24,842		40,036		35,327
Total Revenue Front-end and Back-End	$	144,577	$	104,395	$	218,833	$	146,581

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Mainland China	$	134,767	$	100,275	$	207,226	$	142,405
Other Regions	9,810		4,120		11,607		4,176
	$	144,577	$	104,395	$	218,833	$	146,581

Accounts Receivables and Contract Liabilities

Below are the accounts receivables and contract liabilities balances as of:

	June 30, 2023		December 31, 2022
Accounts receivable	$	200,745	$	182,936
Advances from customers	195,485		153,773
Deferred revenue	5,050		4,174