Significant Customers & Geographical Information - Sales by Product and by Geographical Region (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Product Information [Line Items]
Total Product Sales	$ 3,569,374	$ 2,770,204
Domestic [Member]
Product Information [Line Items]
Total Product Sales	1,684,167	867,560
Domestic [Member] | Instruments [Member]
Product Information [Line Items]
Total Product Sales	661,645	448,965
Domestic [Member] | Handpieces [Member]
Product Information [Line Items]
Total Product Sales	988,143	432,062
Domestic [Member] | Other [Member]
Product Information [Line Items]
Total Product Sales	34,379	(13,467)
International [Member]
Product Information [Line Items]
Total Product Sales	1,885,207	1,902,644
International [Member] | Instruments [Member]
Product Information [Line Items]
Total Product Sales	1,268,156	677,614
International [Member] | Handpieces [Member]
Product Information [Line Items]
Total Product Sales	584,708	1,214,453
International [Member] | Other [Member]
Product Information [Line Items]
Total Product Sales	$ 32,342	$ 10,577