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Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 245,413	$ 233,073	$ 218,569
Ending Balance	262,614	245,413	233,073
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	20	(1,084)	(717)
Other comprehensive loss	(318)	1,104	(367)
Ending Balance	(298)	20	(1,084)
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	20	(1,075)	(706)
Other comprehensive loss	(318)	1,095	(369)
Ending Balance	(298)	20	(1,075)
Held-to-maturity Securities | Changes in fair value of available for sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	(9)	(11)
Other comprehensive loss	0	9	2
Ending Balance	$ 0	$ 0	$ (9)

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

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Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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