Property and Equipment, net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	$ 21,331	$ 18,833
Accumulated depreciation and amortization	(15,962)	(13,532)
Property and equipment, net	5,369	5,301
Depreciation and related amortization expense	2,693	3,563
Impairment of long-lived assets		(194)
Loss on disposal of property and equipment	0	(407)
Lasers Placed-In-Service [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	20,925	18,515
Equipment, Computer Hardware and Software [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	146	168
Furniture and Fixtures [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	234	124
Leasehold Improvements [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	$ 26	$ 26

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount before accumulated depreciation, depletion and amortization of 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, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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