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Property and Equipment Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 19,639	$ 13,513
Accumulated depreciation and amortization	(11,509)	(11,394)
Total property and equipment, net	8,130	2,119
Construction-in-progress
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	6,864	70
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	1,945	2,205
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,915	3,446
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	901	904
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	5,715	5,698
Consigned equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 1,299	$ 1,190

X

- Definition

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

+ References

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-SubTopic 10
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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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