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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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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.

+ References

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Balance Sheet Components - Property and Equipment, net (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 92,629,000us-gaap_PropertyPlantAndEquipmentGross		$ 88,516,000us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation	(19,842,000)		(16,958,000)
Property and equipment, net	72,787,000us-gaap_PropertyPlantAndEquipmentNet		71,558,000us-gaap_PropertyPlantAndEquipmentNet
Depreciation	2,900,000us-gaap_Depreciation	2,300,000us-gaap_Depreciation
Equipment and machinery
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,785,000		18,265,000
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,600,000		7,772,000
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,837,000		1,373,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	21,376,000		19,420,000
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	35,154,000		35,154,000
Construction-in-process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,877,000		6,532,000
Building and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	53,400,000
Line of Credit \| Letter of Credit
Property, Plant and Equipment [Line Items]
Letter of credit	$ 4,000,000