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Component of Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Manufacturing equipment	$ 6,880	$ 8,171
Lab equipment	6,096	6,473
Computer equipment	2,577	2,196
Furniture and fixtures	1,362	1,070
Leasehold improvements	5,768	5,690
Assets in progress	6,645	935
Property, Plant and Equipment, Gross	29,328	24,535
Less accumulated depreciation and amortization	(15,524)	(16,611)
Total	$ 13,804	$ 7,924
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)	5 years
Leasehold Improvements | Maximum
Property Plant And Equipment [Line Items]
Estimated Useful Lives (In years)	8 years

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Computer 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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-Publisher FASB
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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 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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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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