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Note 14 - Financial Instruments - Summary of Derivative Fair Values (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Measurement Input, Price Volatility [Member]
Warrants, volatility	1.09
Class B Warrants [Member] | Non-Current Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]
Warrants, fair value	$ 66	$ 609
Class B Warrants [Member] | Non-Current Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Measurement Input, Price Volatility [Member]
Warrants, volatility		1.09

X

- Definition

Fair value as of the balance sheet date of all price risk derivative liabilities not designated as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959

+ Details

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X

- 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=117815213&loc=d3e19207-110258

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- Details

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- Details

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