Quarterly report pursuant to Section 13 or 15(d)

SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Additional Information (Details)

v3.21.1
SEGMENT REPORTING AND GEOGRAPHIC INFORMATION - Additional Information (Details) - segment
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Segment Reporting and Geographic Information        
Number of reportable segments     4  
Customer Concentration Risk | Revenue from Contract with Customer Benchmark | Customer One        
Segment Reporting and Geographic Information        
Concentration risk, percentage 24.00% 20.00% 17.00% 20.00%
Customer Concentration Risk | Revenue from Contract with Customer Benchmark | Customer Two        
Segment Reporting and Geographic Information        
Concentration risk, percentage 16.00% 17.00% 15.00% 13.00%
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