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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- Definition

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 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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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Property and Equipment, net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	$ 18,698		$ 18,698		$ 18,437
Accumulated depreciation and amortization	(13,000)		(13,000)		(10,734)
Property and equipment, net	5,698		5,698		7,703
Depreciation and related amortization expense	850	$ 1,097	2,762	$ 3,292
Lasers Placed-In-Service [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	18,352		$ 18,352		17,820
Estimated useful life			5 years
Equipment, Computer Hardware and Software [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	185		$ 185		462
Equipment, Computer Hardware and Software [Member] \| Minimum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			3 years
Equipment, Computer Hardware and Software [Member] \| Maximum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			7 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	130		$ 130		124
Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			7 years
Leasehold Improvements [Member]
Property, Plant and Equipment, Net [Abstract]
Property and equipment, gross	$ 31		$ 31		$ 31
Automobiles [Member] \| Minimum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			3 years
Automobiles [Member] \| Maximum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			7 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Net [Abstract]
Estimated useful life			7 years