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Note 6 - Stockholders' Equity - Common Share Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands								3 Months Ended
	Mar. 01, 2022	Dec. 01, 2021	Sep. 01, 2021	Jun. 01, 2021	Mar. 01, 2021	Dec. 01, 2020	Sep. 01, 2020	Mar. 31, 2022	Mar. 31, 2021
Dividend (in dollars per share)	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.05	$ 0.05	$ 0.05
Total paid	$ 822	$ 822	$ 822	$ 817	$ 680	$ 680	$ 678	$ 822	$ 680

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

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