Share-Based Compensation - Summary of information about stock options 2009 plan (Details) - 2009 Plan - Range of Exercise Price - $0.00 - $5.00 - Options	12 Months Ended
	Sep. 30, 2019 $ / 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)	$ 5.00
Options outstanding at the end of the period (in shares) | shares	550,834
Options Outstanding - Weighted-Average Remaining Contractual Life	2 years 9 months 18 days
Options Outstanding - Weighted-Average Exercise Price (in dollars per share)	$ 3.32
Options exercisable at the end of the period (in shares) | shares	550,834
Options Exercisable - Weighted-Average Exercise Price (in dollars per share)	$ 3.32