Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule property and equipment [Abstract]
Property and equipment, gross	$ 20,239		$ 18,568
Accumulated depreciation and amortization	(8,781)		(8,079)
Total property and equipment, net	11,458		10,489
Depreciation and related amortization expense	824	634
Lasers-in-Service [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	14,277		12,599
Equipment, Computer Hardware and Software [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	4,715		4,730
Furniture and Fixtures [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	759		705
Leasehold Improvements [Member]
Schedule property and equipment [Abstract]
Property and equipment, gross	$ 488		$ 534

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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