Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Concentrations - Summary of Net Revenue from Various Products (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Concentration Risk [Line Items]      
Net revenue $ 37,799 $ 46,155 $ 46,926
Product Concentration Risk | Sales Revenue, Net      
Concentration Risk [Line Items]      
Percentage of sales 100.00% 100.00% 100.00%
Laser systems      
Concentration Risk [Line Items]      
Net revenue $ 22,842 $ 29,733 $ 29,121
Laser systems | Product Concentration Risk | Sales Revenue, Net      
Concentration Risk [Line Items]      
Percentage of sales 60.40% 64.40% 62.00%
Imaging systems      
Concentration Risk [Line Items]      
Net revenue $ 619 $ 1,694 $ 3,685
Imaging systems | Product Concentration Risk | Sales Revenue, Net      
Concentration Risk [Line Items]      
Percentage of sales 1.60% 3.70% 7.90%
Consumables and other      
Concentration Risk [Line Items]      
Net revenue $ 7,164 $ 8,287 $ 7,332
Consumables and other | Product Concentration Risk | Sales Revenue, Net      
Concentration Risk [Line Items]      
Percentage of sales 19.00% 18.00% 15.60%
Services      
Concentration Risk [Line Items]      
Net revenue $ 7,162 $ 6,429 $ 6,660
Services | Product Concentration Risk | Sales Revenue, Net      
Concentration Risk [Line Items]      
Percentage of sales 19.00% 13.90% 14.20%
License fees and royalties      
Concentration Risk [Line Items]      
Net revenue $ 12 $ 12 $ 128
License fees and royalties | Product Concentration Risk | Sales Revenue, Net      
Concentration Risk [Line Items]      
Percentage of sales     0.30%