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

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.14)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

Additions made to capitalized computer software costs during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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-Section S99

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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-Subparagraph (SX 210.5-02.13)

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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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Balance Sheet Components - Property and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 6,719,000us-gaap_PropertyPlantAndEquipmentGross	$ 6,453,000us-gaap_PropertyPlantAndEquipmentGross
Less: Accumulated depreciation and amortization	(5,118,000)	(3,988,000)
Property and equipment, net	1,601,000us-gaap_PropertyPlantAndEquipmentNet	2,465,000us-gaap_PropertyPlantAndEquipmentNet
Depreciation and amortization expense	1,300,000	1,300,000	1,400,000
Distribution equipment (useful lives of lesser of 7 years or contract term)
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	7 years
Total property and equipment	5,582,000	5,475,000
Computer and office equipment (useful lives of 3 to 5 years)
Property, Plant and Equipment [Line Items]
Total property and equipment	383,000	377,000
Computer and office equipment (useful lives of 3 to 5 years) \| Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Computer and office equipment (useful lives of 3 to 5 years) \| Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Software, including internal-use software (useful lives of 3 years)
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Total property and equipment	329,000	237,000
Capitalized costs associated with internal-use software developed as part of implementing ERP system	200,000
Leasehold improvements (useful lives of lesser of estimated life or lease term)
Property, Plant and Equipment [Line Items]
Total property and equipment	226,000	214,000
Furniture and fixtures (useful lives of 5 years)
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Total property and equipment	$ 199,000	$ 150,000