Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting and Geographic Information - Additional Information (Details)

v3.19.3.a.u2
Segment Reporting and Geographic Information - Additional Information (Details)
3 Months Ended 6 Months Ended
Dec. 31, 2019
customer
Dec. 31, 2018
customer
Dec. 31, 2019
segment
customer
Dec. 31, 2018
customer
Jun. 30, 2019
customer
Segment Reporting and Geographic Information          
Number of reportable segments     4    
Number of customers with significant revenue | customer 2 2 2 1  
Segment percent of total revenues 100.00% 100.00% 100.00% 100.00%  
Number of customers with significant accounts receivable | customer 1   1   1
Customer One          
Segment Reporting and Geographic Information          
Segment percent of total revenues 24.00% 14.00% 21.00% 14.00%  
Customer Two          
Segment Reporting and Geographic Information          
Segment percent of total revenues 10.00% 13.00% 11.00%    
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