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Note 14 - Long Term Debt and Financial Instruments Carried at Fair Value - Valuation Model of Warrants (Details) $ / shares in Units, € in Thousands, $ in Thousands	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2018 EUR (€)	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2017 EUR (€)	Apr. 14, 2016 USD ($) $ / shares	Apr. 14, 2016 EUR (€)	Mar. 28, 2012 USD ($) $ / shares	Mar. 28, 2012 EUR (€)
May 2013 Investor Warrants [Member]
Unit fair value (in dollars per share)			$ 0.26				$ 2.35
Total fair value			$ 392	€ 328			$ 3,525	€ 2,725
April 2016 Investor Warrants [Member]
Unit fair value (in dollars per share)			$ 0.19		$ 1.09
Total fair value			$ 614	€ 512	$ 3,579	€ 3,168
Measurement Input, Share Price [Member] | May 2013 Investor Warrants [Member]
Warrants, measurement input			2.87	2.87			3.96	3.96
Measurement Input, Share Price [Member] | April 2016 Investor Warrants [Member]
Warrants, measurement input			2.87	2.87	3.64	3.64
Measurement Input, Exercise Price [Member] | May 2013 Investor Warrants [Member]
Warrants, measurement input			4.25	4.25			4.25	4.25
Measurement Input, Exercise Price [Member] | April 2016 Investor Warrants [Member]
Warrants, measurement input			4.5	4.5	4.5	4.5
Measurement Input, Risk Free Interest Rate [Member] | May 2013 Investor Warrants [Member]
Warrants, measurement input			0	0			1.07	1.07
Measurement Input, Risk Free Interest Rate [Member] | April 2016 Investor Warrants [Member]
Warrants, measurement input			0	0	0	0
Measurement Input, Price Volatility [Member] | May 2013 Investor Warrants [Member]
Warrants, measurement input			57.4	57.4			71	71
Measurement Input, Price Volatility [Member] | April 2016 Investor Warrants [Member]
Warrants, measurement input			0.574	0.574	0.602	0.602
Measurement Input, Expected Dividend Rate [Member] | May 2013 Investor Warrants [Member]
Warrants, measurement input			0	0			0	0
Measurement Input, Expected Dividend Rate [Member] | April 2016 Investor Warrants [Member]
Warrants, measurement input			0	0	0	0

X

- Definition

The fair value per share or per unit of warrants or rights outstanding.

+ References

No definition available.

+ Details

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X

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

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- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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