Concentrations - Summary of Net Revenue from Various Products (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Concentration Risk [Line Items]
Total net revenue	$ 12,235	$ 9,134	$ 22,401	$ 17,250
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Laser systems
Concentration Risk [Line Items]
Total net revenue	$ 7,987	$ 5,720	$ 14,322	$ 10,540
Laser systems | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	65.30%	62.60%	63.90%	61.10%
Consumables and other
Concentration Risk [Line Items]
Total net revenue	$ 3,038	$ 2,358	$ 5,748	$ 4,595
Consumables and other | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	24.80%	25.80%	25.70%	26.60%
Services
Concentration Risk [Line Items]
Total net revenue	$ 1,210	$ 1,056	$ 2,331	$ 2,115
Services | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	9.90%	11.60%	10.40%	12.30%