Quarterly report pursuant to Section 13 or 15(d)

Summary of Percentages of Sales by Product line (Detail)

v3.19.1
Summary of Percentages of Sales by Product line (Detail) - Product Concentration Risk - Sales Revenue, Net
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation Of Revenue [Line Items]    
Percentage of sales 100.00% 100.00%
Waterlase (laser systems)    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 31.80% 35.00%
Diodes (laser systems)    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 26.00% 22.00%
Imaging systems    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 5.30% 5.80%
Consumables and Other    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 20.50% 20.30%
Services    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 16.40% 16.90%