Stock-Based Compensation - Stock option activity (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Number of Shares
Balance, Beginning			1,389,999
Granted			1,040,810
Forfeited			(212,258)
Balance, Ending	2,218,551		2,218,551
Vested and exercisable	377,985		377,985
Vested and expected to vest	2,218,551		2,218,551
Weighted Average Exercise Price
Balance, Beginning			$ 3.46
Granted			1.00
Forfeited			2.87
Balance, Ending	$ 2.36		2.36
Vested and exercisable	4.03		4.03
Vested and expected to vest	$ 2.36		$ 2.36
Other option information
Balance			9 years 4 months 24 days
Vested and exercisable			9 years 1 month 6 days
Vested and expected to vest			9 years 4 months 24 days
Aggregate intrinsic value	$ 29,177		$ 29,177
Weighted average grant date fair value of the options awarded to employees	$ 0.72	$ 6.36