Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2020

Stock-Based Compensation

Schedule of stock-based compensation expense

	Three months ended March 31,				Six months ended March 31,
	2020		2019		2020		2019
Research and development	$	41,148	$	120,763	$	148,938	$	211,972
General and administrative		263,391		146,979		515,078		928,059
	$	304,539	$	267,742	$	664,016	$	1,140,031

Schedule of options to purchase common stock of Company outstanding under 2015 Plan

				Weighted
				Average
		Weighted		Remaining
	Number of	Average		Contractual
	Shares	Exercise Price		Term (Years)
Balance at October 1, 2019	1,389,999	$	3.46
Granted	1,040,810		1.00
Forfeited	(212,258)		2.87
Balance at March 31, 2020	2,218,551		2.36	9.4
Vested and exercisable	377,985		4.03	9.1
Vested and expected to vest at March 31, 2020	2,218,551	$	2.36	9.4

Schedule of weighted-average assumptions used in option pricing model for stock options

	Six months ended March 31,
	2020		2019
Risk-free interest rate	1.13	%	2.79	%
Expected life (years)	5.71		5.87
Expected volatility	89.2	%	88.8	%
Expected dividend yield	—		—

Schedule of performance-based stock units activity

				Weighted
				Average
	Number	Base		Remaining
	of	Price		Contractual
	PSUs	Per PSU		Term (Years)
Balance at October 1, 2019	15,691	$	49.97
Forfeitures	(13,221)		50.60
Balance at March 31, 2020	2,470		49.97	4.3
Vested and exercisable at March 31, 2020	2,470		49.97	4.3
Vested and expected to vest at March 31, 2020	2,470	$	49.97	4.3

Schedule of restricted stock units activity

		Weighted
	Number	Average
	of	Grant Date
	RSUs	Fair Value
Balance at October 1, 2019	109	$	96.00
Vested and settled	(109)		96.00
Balance at March 31, 2020	—	$	—