Quarterly report pursuant to Section 13 or 15(d)

Concentrations - Summary of Net Revenue from Various Products (Detail)

v3.19.1
Concentrations - Summary of Net Revenue from Various Products (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Concentration Risk [Line Items]    
Net revenue $ 10,326 $ 10,020
Product Concentration Risk | Sales Revenue, Net    
Concentration Risk [Line Items]    
Percentage of sales 100.00% 100.00%
Laser systems    
Concentration Risk [Line Items]    
Net revenue $ 5,964 $ 5,703
Laser systems | Product Concentration Risk | Sales Revenue, Net    
Concentration Risk [Line Items]    
Percentage of sales 57.80% 57.00%
Imaging systems    
Concentration Risk [Line Items]    
Net revenue $ 552 $ 583
Imaging systems | Product Concentration Risk | Sales Revenue, Net    
Concentration Risk [Line Items]    
Percentage of sales 5.30% 5.80%
Consumables and other    
Concentration Risk [Line Items]    
Net revenue $ 2,112 $ 2,034
Consumables and other | Product Concentration Risk | Sales Revenue, Net    
Concentration Risk [Line Items]    
Percentage of sales 20.50% 20.30%
Services    
Concentration Risk [Line Items]    
Net revenue $ 1,695 $ 1,697
Services | Product Concentration Risk | Sales Revenue, Net    
Concentration Risk [Line Items]    
Percentage of sales 16.40% 16.90%
License fees and royalties    
Concentration Risk [Line Items]    
Net revenue $ 3 $ 3