Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summarized Information about Stock Options

The following table summarizes information about stock options:

	Number of Options Outstanding			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value
Balance At September 30, 2019		4,773,670		$	8.16
Granted		787,500		50.42
Cancelled		(42,409	)	25.04
Exercised		(989,197	)	6.54
Balance At June 30, 2020		4,529,564		$	15.71	6.2 years	$	133,654,814
Exercisable At June 30, 2020		2,928,765		$	7.66	4.8 years	$	104,700,213

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

	Nine Months Ended June 30,
	2020	2019
Dividend yield	—	—
Risk-free interest rate	0.4 – 1.8%	1.9 – 3.1%
Volatility	90.5 – 91.9%	115%
Expected life (in years)	6.25	6.25
Weighted average grant date fair value per share of options granted	$38.12	$12.21

Summary of Share Activity Related to RSUs

The following table summarizes the activity of the Company’s RSUs:

	Number of RSUs			Weighted- Average Grant Date Fair Value
Unvested at September 30, 2019		2,062,833		$	9.43
Granted		2,486,646			57.04
Vested		(1,155,404	)		9.65
Forfeited		(67,000	)		31.78
Unvested at June 30, 2020		3,327,075		$	44.49