Note 19 - Fair Value of Financial Instruments - Reconciliation of the Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Balance	$ 14,406	$ 14,592	$ 14,406	$ 14,592
Asset, balance	14,406	14,592	14,406	14,592
Ending balance	1,306	193	1,306	193
liabilities, balance	1,306	193	1,306	193
Warrant Liability [Member]
Beginning balance	0	259	0	249
Change in fair value of warrant liability included in net (loss) income	0	(66)	0	(56)
Ending balance	0	193	0	193
Included in other comprehensive (loss) income	0	0	0	0
liabilities, balance	0	193	0	193
Share-based Compensation Liabilities [Member]
Beginning balance	1,134	0	443	0
Change in fair value of warrant liability included in net (loss) income	172	0	863	0
Ending balance	1,306	0	1,306	0
liabilities, balance	1,306	0	1,306	0
Equity Method Investments [Member] \| Limited Liability Investments [Member]
Balance	3,302	4,290	3,263	4,392
Distributions received	(80)	(32)	(313)	(109)
Balance	3,744	3,930	3,744	3,930
Included in other comprehensive (loss) income	(0)	(0)	(0)	(0)
Included in other comprehensive (loss) income	0	0	0	0
Asset, balance	3,744	3,930	3,744	3,930
Equity Method Investments [Member] \| Limited Liability Investments [Member] \| Realized Investment Gains (Losses) [Member]
Realized gains included in net (loss) income	80	12	290	98
Change in fair value of real estate investments included in net (loss) income	80	12	290	98
Included in net (loss) income	80	12	290	98
Equity Method Investments [Member] \| Limited Liability Investments [Member] \| Gain (Loss) On Change In Fair Value Of Limited Liability Investments At Fair Value [Member]
Realized gains included in net (loss) income	442	(340)	504	(451)
Change in fair value of real estate investments included in net (loss) income	442	(340)	504	(451)
Included in net (loss) income	442	(340)	504	(451)
Real Estate Investments [Member]
Balance	10,662	10,662	10,662	10,662
Realized gains included in net (loss) income	0	0	0	0
Balance	10,662	10,662	10,662	10,662
Included in other comprehensive (loss) income	(0)	(0)	(0)	(0)
Change in fair value of real estate investments included in net (loss) income	0	0	0	0
Included in net (loss) income	0	0	0	0
Included in other comprehensive (loss) income	0	0	0	0
Asset, balance	$ 10,662	$ 10,662	$ 10,662	$ 10,662

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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