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Stock Based Incentive Compensation - Summary data of stock option award activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Shares
Outstanding, number of shares	1,000	2,000
Granted, number of shares	0	0
Expired, number of shares	(500)	(500)
Forfeited, number of shares	0	0
Exercised, number of shares	0	(500)
Outstanding, number of shares	500	1,000
Exercisable	500
Vested and expected to vest	500
Weighted Average Exercise Price
Outstanding, weighted average exercise price (in Dollars per share)	$ 3.64	$ 3.75
Granted, weighted average exercise price (in Dollars per share)	0	0
Expired, weighted average exercise price (in Dollars per share)	3.85	3.85
Forfeited, weighted average exercise price (in Dollars per share)	0	0
Exercised, weighted average exercise price (in Dollars per share)		3.85
Outstanding, weighted average exercise price (in Dollars per share)		$ 3.64
Exercisable (in Dollars per share)	3.43
Vested and expected to vest (in Dollars per share)	$ 3.43
Outstanding, weighted average remaining contractual term	3 months 14 days
Exercisable - - weighted average remaining contractual term	3 months 14 days
Vested and expected to vest - weighted average remaining contractual term	3 months 14 days
Outstanding, aggregate intrinsic value (in Dollars)	$ 4
Exercisable - intrinsic value (in Dollars)	4
Vested and expected to vest - intrinsic value (in Dollars)	$ 4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars)		$ 5

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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