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REVENUE FROM CONTRACTS WITH CUSTOMERS
 6 Months Ended
Jun. 30, 2026
Revenue from Contract with Customer [Abstract]  
REVENUE FROM CONTRACTS WITH CUSTOMERS REVENUE FROM CONTRACTS WITH CUSTOMERS
The Company assesses revenues based upon the nature or type of goods or services it provides and the geographic location of the customer facility. The following table presents disaggregated revenue information:
Three Months Ended June 30,Six Months Ended June 30,
2026202520262025
Single Wafer Cleaning, Tahoe and Semi-Critical Cleaning Equipment$132,978 $154,961 $255,460 $284,530 
ECP (front-end and packaging), Furnace and Other Technologies128,546 48,016 212,785 75,646 
Advanced Packaging (excluding ECP), Services & Spares31,395 12,395 55,937 27,543 
Total revenue by product category$292,919 $215,372 $524,182 $387,719 
During the three and six month periods ended June 30, 2026 and 2025, substantially all revenue was derived from customers in mainland China, and therefore no geographical segment information is presented.

Below are the contract liabilities balances as of:
June 30,
2026		December 31,
2025
Advances from customers$165,566 $187,809 
Deferred revenue15,908 17,388 
Total contract liabilities$181,474 $205,197 
Below are revenues recognized from amounts included in contract liabilities at the beginning of the period:
Three Months Ended June 30,Six Months Ended June 30,
2026202520262025
Revenue recognized from amounts included in contract liabilities at the beginning of the periods$55,672 $58,122 $141,750 $120,241