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Note 7 - Stockholders' Equity - Common Share Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands									1 Months Ended	12 Months Ended
	Dec. 01, 2023	Sep. 01, 2023	Jun. 01, 2023	Mar. 01, 2023	Dec. 01, 2022	Sep. 01, 2022	Jun. 01, 2022	Mar. 01, 2022	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Dividends per share (in dollars per share)	$ 0.06	$ 0.06	$ 0.06	$ 0.06		$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06
Total paid	$ 836	$ 836	$ 835	$ 833	$ 833	$ 829	$ 827	$ 822

X

- Definition

Aggregate dividends paid 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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X

- Definition

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

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