Quarterly report pursuant to Section 13 or 15(d)

Summary of Percentages of Sales by Product line (Detail)

v3.19.3
Summary of Percentages of Sales by Product line (Detail) - Product Concentration Risk - Sales Revenue, Net
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Disaggregation Of Revenue [Line Items]        
Percentage of sales 100.00% 100.00% 100.00% 100.00%
Laser systems        
Disaggregation Of Revenue [Line Items]        
Percentage of sales 59.80% 64.50% 58.10% 62.50%
Imaging systems        
Disaggregation Of Revenue [Line Items]        
Percentage of sales   3.50% 2.20% 4.00%
Consumables and Other        
Disaggregation Of Revenue [Line Items]        
Percentage of sales 17.10% 17.40% 20.60% 18.90%
Services        
Disaggregation Of Revenue [Line Items]        
Percentage of sales 23.10% 14.60% 19.10% 14.60%