Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule property and equipment [Abstract]
Property and equipment, gross	$ 12,329	$ 8,668
Accumulated depreciation and amortization	(5,570)	(3,344)
Total property and equipment, net	6,759	5,324
Depreciation and related amortization expense	2,367	356	288
Capitalized lease arrangements included in long-term debt	0	8
Lasers-in-service [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	7,301	4,187
Equipment, Computer Hardware and Software [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	4,015	3,576
Furniture and Fixtures [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	617	529
Leasehold Improvements [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	396	376
Assets Held under Capital Leases [Member]
Schedule property and equipment [Abstract]
Total property and equipment, net	16	38
Capitalized lease arrangements included in long-term debt	$ 10	$ 30

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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- Definition

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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