Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 17,851		$ 17,008
Accumulated depreciation and amortization	(7,876)		(6,828)
Property and equipment, net	9,975		10,180
Depreciation and related amortization expense	1,089	$ 1,230
Lasers Placed-In-Service [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	17,354		16,712
Equipment, Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	361		160
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	111		111
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 25		$ 25