Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Additional Information (Details)

v3.20.2
SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Additional Information (Details) - segment
3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Segment Reporting and Geographic Information    
Number of reportable segments 4  
Customer One    
Segment Reporting and Geographic Information    
Segment percent of total revenues 14.00%  
Customer Two    
Segment Reporting and Geographic Information    
Segment percent of total revenues 12.00%  
Semiconductor Process Control    
Segment Reporting and Geographic Information    
Number of operating segments 2  
Specialty Semiconductor Process    
Segment Reporting and Geographic Information    
Number of operating segments 1  
PCB, Display and Component Inspection    
Segment Reporting and Geographic Information    
Number of operating segments 2  
Other    
Segment Reporting and Geographic Information    
Number of operating segments 1  
Customer Concentration Risk | Revenue from Contract with Customer Benchmark | Customer One    
Segment Reporting and Geographic Information    
Segment percent of total revenues   19.00%