Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Concentrations - Summary of Net Revenue from Various Products (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Concentration Risk [Line Items]        
Net revenue $ 2,938 $ 8,645 $ 7,721 $ 18,971
Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 100.00% 100.00% 100.00% 100.00%
Laser systems        
Concentration Risk [Line Items]        
Net revenue $ 1,091 $ 4,917 $ 3,142 $ 10,880
Laser systems | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 37.10% 56.90% 40.70% 57.40%
Imaging systems        
Concentration Risk [Line Items]        
Net revenue   $ 63   $ 615
Imaging systems | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales   0.70% 0.00% 3.20%
Consumables and other        
Concentration Risk [Line Items]        
Net revenue $ 862 $ 2,084 $ 2,334 $ 4,196
Consumables and other | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 29.30% 24.10% 30.20% 22.10%
Services        
Concentration Risk [Line Items]        
Net revenue $ 985 $ 1,578 $ 2,245 $ 3,273
Services | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 33.60% 18.30% 29.10% 17.30%
License fees and royalties        
Concentration Risk [Line Items]        
Net revenue   $ 3   $ 7