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Shareholders' Equity and Share-based Payments (Details)	3 Months Ended
	Dec. 31, 2019 USD ($) plan shares	Dec. 31, 2018 USD ($)	Sep. 30, 2019 shares
Share-based compensation
Common stock, shares authorized	75,000,000		75,000,000
Preferred stock, shares authorized	10,000,000		10,000,000
Share-based compensation expense | $	$ 0	$ 0
Number of share-based compensation plans maintained by the company | plan	2
2009 Plan
Share-based compensation
Share-based compensation expense | $	$ 0	0
Number of shares of common stock reserved for awards	1,200,000
2009 Plan | Employee
Share-based compensation
Share-based compensation expense | $	$ 0	0
2009 Plan | Non-employee director
Share-based compensation
Share-based compensation expense | $	$ 0	$ 0
2009 Plan | Performance-based Award | Employee
Share-based compensation
Number of shares of common stock reserved for awards	300,000
2019 Plan
Share-based compensation
Common stock, shares authorized	139,691
Share-based compensation expense | $	$ 0
Number of shares of common stock reserved for awards	750,000
Number of shares of common stock available for awards under the plan	889,691
2019 Plan | Employee
Share-based compensation
Share-based compensation expense | $	$ 0
Number of shares of common stock reserved for awards	300,000
2019 Plan | Non-employee director
Share-based compensation
Share-based compensation expense | $	$ 0

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Represents the number of plans of share-based compensation arrangements maintained by the entity.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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