Consolidated Balance Sheet Details - Property and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment	$ 21,063	$ 19,822
Less accumulated depreciation	(8,052)	(6,261)
Property and equipment, net	13,011	13,561
Depreciation	1,806	1,599	1,584
Machinery, equipment and tooling [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	12,479	12,325
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	6,222	5,068
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	951	961
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	783	783
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 628	$ 685

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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