Stock Based Incentive Compensation - Summary data of nonvested stock award activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Nonvested Shares
Nonvested shares outstanding, number of nonvested shares	197,063	202,742
Granted, number of nonvested shares	152,246	103,465
Vested, number of nonvested shares	(87,957)	(90,395)
Forfeited, number of nonvested shares	(1,564)	(18,750)
Nonvested shares outstanding, number of nonvested shares	259,788	197,063	202,742
Weighted Average Grant-Date Fair Value
Nonvested shares outstanding, weighted average grant date fair value (in Dollars per share)	$ 10.28	$ 11.82
Granted, weighted average grant date fair value (in Dollars per share)	8.53	8.60
Vested, weighted average grant date fair value (in Dollars per share)	10.57	11.79
Forfeited, weighted average grant date fair value (in Dollars per share)	13.24	10.37
Nonvested shares outstanding, weighted average grant date fair value (in Dollars per share)	$ 9.14	$ 10.28	$ 11.82
Nonvested shares outstanding, weighted average remaining contractual term	2 years 4 months 17 days	2 years 1 month 24 days	2 years 2 months 15 days
Nonvested shares outstanding, aggregate intrinsic value (in Dollars)	$ 1,868	$ 1,760	$ 1,750
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)	$ 1,700
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years 6 months 21 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value (in Dollars)	$ 900	$ 1,100

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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