Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting and Geographic Information - Additional Information (Details)

v3.20.1
Segment Reporting and Geographic Information - Additional Information (Details) - segment
3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting and Geographic Information        
Number of reportable segments     4  
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        
Concentration risk, percentage 20.00% 19.00% 20.00% 15.00%
Customer Concentration Risk | Revenue from Contract with Customer Benchmark | Customer Two        
Segment Reporting and Geographic Information        
Concentration risk, percentage 17.00%   13.00% 11.00%
Minimum | Customer Concentration Risk | Accounts Receivable | Customer One        
Segment Reporting and Geographic Information        
Concentration risk, percentage       10.00%