Note 23 - Stock-based Compensation - Schedule Of Share Based Payment Award Stock Options Valuation Assumptions (Details) - $ / shares		12 Months Ended
Jul. 27, 2020	Dec. 31, 2020
Weighted-average fair value of options granted (in dollars per share)		$ 1.50
Expected option lives (in years) (Year)		3 years 8 months 12 days
Weighted-average volatility		98.00%
Expected dividend yield		0.00%
Share-Based Payment Arrangement, Option [Member]
Weighted-average fair value of options granted (in dollars per share)		$ 5.86
Lattice Based Valuation [Member] \| Share-Based Payment Arrangement, Option [Member]
Weighted-average fair value of options granted (in dollars per share)	$ 6.57
Weighted-average volatility	98.00%
Expected dividend yield	0.00%
Weighted Average [Member]
Weighted-average risk-free interest rate		2.43%
Weighted Average [Member] \| Lattice Based Valuation [Member] \| Share-Based Payment Arrangement, Option [Member]
Expected option lives (in years) (Year)	5 years 6 months 25 days
Minimum [Member] \| Lattice Based Valuation [Member] \| Share-Based Payment Arrangement, Option [Member]
Weighted-average risk-free interest rate	0.11%
Maximum [Member] \| Lattice Based Valuation [Member] \| Share-Based Payment Arrangement, Option [Member]
Weighted-average risk-free interest rate	0.30%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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