Quarterly report pursuant to Section 13 or 15(d)

Schedule of Revenue and Percentages of Revenue Sales by Product Line (Detail)

v3.20.1
Schedule of Revenue and Percentages of Revenue Sales by Product Line (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation Of Revenue [Line Items]    
Net revenue $ 4,783 $ 10,326
Product Concentration Risk | Sales Revenue, Net    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 100.00% 100.00%
Laser systems    
Disaggregation Of Revenue [Line Items]    
Net revenue $ 2,051 $ 5,964
Laser systems | Product Concentration Risk | Sales Revenue, Net    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 42.90% 57.80%
Imaging systems    
Disaggregation Of Revenue [Line Items]    
Net revenue   $ 552
Imaging systems | Product Concentration Risk | Sales Revenue, Net    
Disaggregation Of Revenue [Line Items]    
Percentage of sales   5.30%
Consumables and other    
Disaggregation Of Revenue [Line Items]    
Net revenue $ 1,472 $ 2,112
Consumables and other | Product Concentration Risk | Sales Revenue, Net    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 30.80% 20.50%
Services    
Disaggregation Of Revenue [Line Items]    
Net revenue $ 1,260 $ 1,695
Services | Product Concentration Risk | Sales Revenue, Net    
Disaggregation Of Revenue [Line Items]    
Percentage of sales 26.30% 16.40%
License fees and royalties    
Disaggregation Of Revenue [Line Items]    
Net revenue   $ 3