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Note 12 - Share-Based Compensation - Schedule of Recognized Period Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock-based compensation	$ 11,650	$ 14,072	$ 17,630
Research and Development Expense [Member]
Stock-based compensation	4,754	6,123	6,791
Selling, General and Administrative Expenses [Member]
Stock-based compensation	7,140	8,042	8,154
Continuing Operations [Member]
Stock-based compensation	11,894	14,165	14,945
Discontinued Operations [Member]
Stock-based compensation	$ (244)	$ (93)	$ 2,685

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

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X

- Details

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- Details

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X

- Details

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- Details

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