Share-Based Compensation - 2009 Stock-Based Incentive Compensation Plan (Details) - USD ($)	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Options
Outstanding at the beginning of the period (in shares)	104,500	550,834
Outstanding at the end of the period (in shares)	100,000	104,500	550,834
Stock Based Incentive Compensation Plan 2009
Share-Based compensation
Number of shares of common stock reserved for awards	1,200,000
Stock Based Incentive Compensation Plan 2009 | Employee and Non Employee Stock Option
Options
Outstanding at the beginning of the period (in shares)	4,500	550,834	550,834
Exercised (in shares)	(4,500)	(546,334)
Outstanding at the end of the period (in shares)		4,500	550,834
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 3.78	$ 3.32	$ 3.32
Exercised (in dollars per share)	$ 3.78	3.31
Outstanding at the end of the period (in dollars per share)		$ 3.78	$ 3.32
Aggregate Intrinsic Value
Outstanding at the beginning of the period (in dollars)	$ 13,770	$ 761,767	$ 15,000
Exercised (in dollars)	$ 9,892	1,926,782	0
Outstanding at the end of the period (in dollars)		$ 13,770	$ 761,767
Stock Based Incentive Compensation Plan 2009 | Performance Shares | Employee
Share-Based compensation
Maximum award (in shares)	300,000