Property and Equipment, net (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule property and equipment [Abstract]
Property and equipment, gross	$ 41,204		$ 18,568
Accumulated depreciation and amortization	(12,355)		(8,079)
Total property and equipment, net	28,849		10,489
Depreciation and related amortization expense	4,727	2,085
Lasers-in-Service [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	25,261		12,599
Equipment, Computer Hardware and Software [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	5,853		4,730
Furniture and Fixtures [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	1,353		705
Land and Building [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	2,906		0
Leasehold Improvements [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	$ 5,831		$ 534