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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Concentration Risk [Line Items]        
Net revenue $ 6,539 $ 8,646 $ 14,260 $ 27,617
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 $ 3,712 $ 5,167 $ 6,854 $ 16,047
Laser systems | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 56.70% 59.80% 48.10% 58.10%
Imaging systems        
Concentration Risk [Line Items]        
Net revenue   $ 4   $ 619
Imaging systems | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales   0.00%   2.20%
Consumables and other        
Concentration Risk [Line Items]        
Net revenue $ 1,929 $ 1,478 $ 4,263 $ 5,678
Consumables and other | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 29.50% 17.10% 29.90% 20.60%
Services        
Concentration Risk [Line Items]        
Net revenue $ 898 $ 1,994 $ 3,143 $ 5,264
Services | Product Concentration Risk | Sales Revenue, Net        
Concentration Risk [Line Items]        
Percentage of sales 13.80% 23.10% 22.00% 19.10%
License fees and royalties        
Concentration Risk [Line Items]        
Net revenue   $ 3   $ 9