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Note 13 - Subsequent Events (Details Textual) - $ / shares							3 Months Ended		6 Months Ended
	Sep. 13, 2023	Jul. 13, 2023	Jun. 14, 2023	Apr. 13, 2023	Mar. 15, 2023	Jan. 12, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Common Stock, Dividends, Per Share, Declared (in dollars per share)				$ 0.33		$ 0.33
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)			$ 0.33		$ 0.33		$ 0.33	$ 0.31	$ 0.66	$ 0.62
Forecast [Member]
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.34
Subsequent Event [Member]
Dividends Payable, Date Declared		Jul. 13, 2023
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.34
Dividends Payable, Date to be Paid		Sep. 13, 2023
Dividends Payable, Date of Record		Sep. 01, 2023

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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Balance Type:	na
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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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X

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482913/230-10-50-3

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X

- Definition

Date the dividend to be paid was declared, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482913/230-10-50-3

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- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

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X

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