Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2022

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, 2021		3,456,239		$	19.60
Granted		-			-
Cancelled		(61,820	)	44.77
Exercised		(444,764	)	8.28
Balance at March 31, 2022		2,949,655		$	20.78	5.4 years	$	83,259,543
Exercisable at March 31, 2022		2,342,356		$	15.41	4.8 years	$	75,982,912

Assumptions Used to Value Stock Options

The assumptions used to value stock options are as follows:

	Six Months Ended March 31,
	2022	2021
Dividend yield	N/A		-
Risk-free interest rate	N/A	0.4 – 0.6%
Volatility	N/A	86.6 – 90.4%
Expected life (in years)	N/A		6.25
Weighted average grant date fair value per share of options granted	N/A	$	48.62

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 Per Share
Unvested at September 30, 2021		3,831,850		$	61.24
Granted		1,605,450			56.73
Vested		(931,063	)		49.25
Forfeited		(37,625	)		63.42
Unvested at March 31, 2022		4,468,612		$	62.10