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Note 11 - Stockholders' Equity - Dividends Declared (Details) - $ / shares	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Common Class A [Member]
Cash Dividend Declared (in dollars per share)	$ 0	$ 0.045
Common Class A [Member] | O 2024 Q1 Dividends [Member]
Cash Dividend Declared (in dollars per share)	0
Common Class A [Member] | O 2023 Q1 Dividends [Member]
Cash Dividend Declared (in dollars per share)		0.022
Common Class A [Member] | O 2024 Q2 Dividends [Member]
Cash Dividend Declared (in dollars per share)	0
Common Class A [Member] | O 2023 Q2 Dividends [Member]
Cash Dividend Declared (in dollars per share)		0.023
Series D Preferred Stock [Member]
Distributions Declared (in dollars per share)	1.17186	1.17186
Series D Preferred Stock [Member] | O 2024 M1 Dividends [Member]
Distributions Declared (in dollars per share)	0.19531
Series D Preferred Stock [Member] | O 2023 M1 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
Series D Preferred Stock [Member] | O 2024 M2 Dividends [Member]
Distributions Declared (in dollars per share)	0.19531
Series D Preferred Stock [Member] | O 2023 M2 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
Series D Preferred Stock [Member] | O 2024 M3 Dividends [Member]
Distributions Declared (in dollars per share)	0.19531
Series D Preferred Stock [Member] | O 2023 M3 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
Series D Preferred Stock [Member] | O 2024 M4 Dividends [Member]
Distributions Declared (in dollars per share)	0.19531
Series D Preferred Stock [Member] | O 2023 M4 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
Series D Preferred Stock [Member] | O 2024 M5 Dividends [Member]
Distributions Declared (in dollars per share)	0.19531
Series D Preferred Stock [Member] | O 2023 M5 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
Series D Preferred Stock [Member] | O 2024 M6 Dividends [Member]
Distributions Declared (in dollars per share)	$ 0.19531
Series D Preferred Stock [Member] | O 2023 M6 Dividends [Member]
Distributions Declared (in dollars per share)		$ 0.19531

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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- Definition

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+ References

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