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Note 4 - Balance Sheet Details (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 4 - Balance Sheet Details (Details) [Line Items]
Depreciation	$ 578,000us-gaap_Depreciation	$ 333,000us-gaap_Depreciation	$ 197,000us-gaap_Depreciation
Asset Impairment Charges	905,000us-gaap_AssetImpairmentCharges
Equipment [Member]
Note 4 - Balance Sheet Details (Details) [Line Items]
Asset Impairment Charges	905,000us-gaap_AssetImpairmentCharges / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember
Assets Held-for-sale, Long Lived, Fair Value Disclosure	$ 115,000us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_EquipmentMember

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ 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)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228

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- Definition

Fair value portion of assets classified as held for sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

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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

-Paragraph 28

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-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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