Component of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Manufacturing equipment	$ 12,029	$ 12,104
Lab equipment	6,938	6,686
Computer equipment	5,465	4,760
Furniture and fixtures	1,809	1,629
Leasehold improvements	11,367	10,873
Assets in progress	2,605	1,176
Property, Plant and Equipment, Gross	40,213	37,228
Less accumulated depreciation and amortization	(23,149)	(20,609)
Total	$ 17,064	$ 16,619
Manufacturing Equipment \| Minimum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	5 years
Manufacturing Equipment \| Maximum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	14 years
Lab Equipment \| Minimum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	5 years
Lab Equipment \| Maximum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	13 years
Computer Equipment
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	3 years
Furniture and Fixtures \| Minimum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	3 years
Furniture and Fixtures \| Maximum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	13 years
Leasehold Improvements \| Minimum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	1 year
Leasehold Improvements \| Maximum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	5 years

Computer equipment, Gross.

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Laboratory Equipment Gross

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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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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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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.

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