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Note 12 - Contingencies and Commitments (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Dividends, Common Stock, Cash		$ 335,000	$ 335,000	$ 338,000	$ 338,000
Monthly Dividend [Member] | Forecast [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.0075
Dividends, Common Stock, Cash	$ 335,000

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

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ 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

- Details

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