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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 206,899	$ 187,630	$ 171,067
Ending Balance	218,569	206,899	187,630
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	59	61	50
Other comprehensive income (loss)	(776)	(2)	11
Ending Balance	(717)	59	61
Available-for-sale Securities [Member] | Changes in fair value of available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	75	87	90
Other comprehensive income (loss)	(781)	(12)	(3)
Ending Balance	(706)	75	87
Held-to-maturity Securities | Changes in fair value of available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(16)	(26)	(40)
Other comprehensive income (loss)	5	10	14
Ending Balance	$ (11)	$ (16)	$ (26)

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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