Accrued Liabilities - Additional Information (Detail) - Maximum	6 Months Ended
	Jun. 30, 2019
Diode Systems
Accrued Liabilities [Line Items]
Product warrant period	28 months
United States | Waterlase Laser Systems
Accrued Liabilities [Line Items]
Product warrant period	16 months
International | Waterlase Laser Systems
Accrued Liabilities [Line Items]
Product warrant period	28 months