Share-Based Compensation - Summary of information about stock options 2019 plan (Details) - 2019 Plan - Exercise Price Range from Dollars 0.00 to Dollars 5.00 - Employee and Non Employee Stock Option	12 Months Ended
	Sep. 30, 2021 $ / shares shares
Information about stock options, by exercise price range
Exercise price, low end of range (in dollars per share)	$ 0.00
Exercise price, high end of range (in dollars per share)	$ 8.00
Options outstanding at the end of the period (in shares) | shares	100,000
Options Outstanding - Weighted-Average Remaining Contractual Life	8 years 10 months 24 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share)	$ 7.10
Options exercisable at the end of the period (in shares) | shares	50,000
Options Exercisable - Weighted-Average Exercise Price (in dollars per share)	$ 7.10