Stockholders' Equity (Tables)

6 Months Ended

Mar. 31, 2023

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity for Restricted Stock Units

A summary of the activity for restricted stock units for the three and six-months ended March 31, 2023:

	Three-Months Ended March 31, 2023					Six-Months Ended March 31, 2023
	Number of options			Weighted-Average Grant Date Fair Value		Number of options			Weighted-Average Grant Date Fair Value
Beginning balance		171		$	91.96		59		$	98.29
Granted		1			100.55		113			88.91
Forfeited		(1	)		83.24		(1	)		83.24
Ending balance		171		$	92.19		171		$	92.19

Stock Options [Member]

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity for Stock Option Awards

The following is a summary of the activity for stock option awards:

	Three-Months Ended March 31, 2023					Six-Months Ended March 31, 2023
	Number of options			Weighted-Average Exercise Price per Share		Number of options			Weighted-Average Exercise Price per Share
Beginning balance		5,836		$	75.27		5,339		$	74.40
Granted		4			100.49		522			83.76
Exercised		(251	)		50.82		(270	)		51.14
Forfeited		(15	)		90.71		(17	)		91.90
Ending balance		5,574		$	76.35		5,574		$	76.35

Changes in Non-vested Stock Options

Changes in non-vested stock options were as follows:

	Three-Months Ended March 31, 2023					Six-Months Ended March 31, 2023
	Number of options			Weighted-Average Grant Date Fair Value per Share		Number of options			Weighted-Average Grant Date Fair Value Per Share
Beginning balance		1,751		$	30.98		1,812		$	30.03
Granted		4			40.23		522			33.67
Exercised		(65	)		22.13		(642	)		29.07
Forfeited		(15	)		32.89		(17	)		33.23
Ending balance		1,675		$	31.39		1,675		$	31.39

Stock Options Vested, or Expected to Vest and Exercisable

Information about stock options that have vested, or are expected to vest, and are exercisable at March 31, 2023 was as follows:

	Number of options		Weighted-Average Exercise Price		Weighted-Average Remaining Life in Years		Aggregate Intrinsic Value
Options outstanding		5,574	$	76.35		5.6	$	130,942
Options vested and exercisable		3,899		71.14		4.5		107,908
Options vested and expected to vest		5,503		76.16		5.6		130,216