Note 13 - Contingencies and Commitments (Details Textual) - USD ($)	3 Months Ended
Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2022
Dividends, Common Stock, Cash			$ 322,000	$ 335,000
Monthly Dividend [Member] \| Forecast [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.0075	$ 0.0075
Dividends, Common Stock, Cash		$ 324,000

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

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
Period Type:	duration