Concentrations - Summary of Net Revenue from Various Products (Detail) - Product Concentration Risk - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Concentration Risk [Line Items]
Concentration Risk Percentage	100.00%	100.00%	100.00%	100.00%
Laser systems
Concentration Risk [Line Items]
Concentration Risk Percentage	63.10%	70.70%	62.60%	67.00%
Imaging systems
Concentration Risk [Line Items]
Concentration Risk Percentage	7.50%	5.00%	6.70%	5.60%
Consumables and other
Concentration Risk [Line Items]
Concentration Risk Percentage	16.30%	12.50%	15.90%	14.10%
Services
Concentration Risk [Line Items]
Concentration Risk Percentage	12.80%	11.40%	14.50%	13.00%
License fees and royalties
Concentration Risk [Line Items]
Concentration Risk Percentage	0.30%	0.40%	0.30%	0.30%