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Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Schedule property and equipment [Abstract]      
Property and equipment, gross $ 17,392   $ 12,329
Accumulated depreciation and amortization (7,391)   (5,570)
Total property and equipment, net 10,001   6,759 [1]
Depreciation and related amortization expense 2,085 1,746  
Lasers-in-Service [Member]
     
Schedule property and equipment [Abstract]      
Property and equipment, gross 11,660   7,301
Equipment, Computer Hardware and Software [Member]
     
Schedule property and equipment [Abstract]      
Property and equipment, gross 4,563   4,015
Furniture and Fixtures [Member]
     
Schedule property and equipment [Abstract]      
Property and equipment, gross 668   617
Leasehold Improvements [Member]
     
Schedule property and equipment [Abstract]      
Property and equipment, gross $ 501   $ 396
[1] Restated