Note 4 - Balance Sheet Detail (Details) - Goodwill and Other Intangible Assets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Note 4 - Balance Sheet Detail (Details) - Goodwill and Other Intangible Assets [Line Items]
Finite-lived intangible assets, accumulated amortization amount	$ 4,068	$ 2,643
Intangible assets, net amount	595us-gaap_FiniteLivedIntangibleAssetsNet
Goodwill, gross carrying amount	1,339us-gaap_GoodwillGross	1,339us-gaap_GoodwillGross
Goodwill, net amount	1,339us-gaap_Goodwill	1,339us-gaap_Goodwill
Total intangible assets, gross carrying amount	6,002	6,002
Total finite-lived intangible assets, accumulated amortization amount	4,068	2,643
Total intangible assets, net amount	1,934	3,359
Patents [Member]
Note 4 - Balance Sheet Detail (Details) - Goodwill and Other Intangible Assets [Line Items]
Intangible assets, gross carrying amount	1,218	1,218
Finite-lived intangible assets, accumulated amortization amount	1,206	1,068
Intangible assets, net amount	12	150
Total finite-lived intangible assets, accumulated amortization amount	1,206	1,068
Customer Relationships [Member]
Note 4 - Balance Sheet Detail (Details) - Goodwill and Other Intangible Assets [Line Items]
Intangible assets, gross carrying amount	2,510	2,510
Finite-lived intangible assets, accumulated amortization amount	1,998	962
Intangible assets, net amount	512	1,548
Total finite-lived intangible assets, accumulated amortization amount	1,998	962
Other Intangible Assets [Member]
Note 4 - Balance Sheet Detail (Details) - Goodwill and Other Intangible Assets [Line Items]
Intangible assets, gross carrying amount	780	780
Finite-lived intangible assets, accumulated amortization amount	780	607
Intangible assets, net amount		173
Total finite-lived intangible assets, accumulated amortization amount	780	607
Other Intangible [Member]
Note 4 - Balance Sheet Detail (Details) - Goodwill and Other Intangible Assets [Line Items]
Intangible assets, gross carrying amount	155	155
Finite-lived intangible assets, accumulated amortization amount	84	6
Intangible assets, net amount	71	149
Total finite-lived intangible assets, accumulated amortization amount	$ 84	$ 6

Amount before accumulated amortization of intangible assets, including goodwill.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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