Stock-based Compensation (Tables)

3 Months Ended

Apr. 30, 2024

Share-Based Payment Arrangement [Abstract]

Classification of Stock-based Compensation

The following table presents the classification of stock-based compensation for the periods indicated:

	Three Months Ended April 30,
	2024		2023
	(in thousands)
Stock-based compensation:
Cost of revenue	$	607	$	941
Research and development		17,621		18,361
Selling, general and administrative		7,808		7,963
Total stock-based compensation	$	26,036	$	27,265

Weighted-Average Assumptions Used to Estimate Fair Value

The following table sets forth the weighted-average assumptions used to estimate the fair value of employee stock purchase plan awards for the periods indicated:

	Three Months Ended April 30,
	2024			2023
Employee stock purchase plan awards:
Volatility		39	%		59	%
Risk-free interest rate		5.38	%		4.73	%
Expected term (years)		0.5		0.5
Dividend yield		0	%		0	%

Stock Option Activities

The following table summarizes stock option activities for the period indicated:

	Option Outstanding
									Weighted-
							Total Intrinsic		Average
						Weighted-	Value Of		Remaining		Aggregate
				Weighted-		Average	Options		Contractual		Intrinsic
				Average		Grant-date	Exercised		Term		Value
	Shares			Exercise Price		Fair Value	(in thousands)		(in years)		(in thousands)
Outstanding at January 31, 2024		373,318		$	46.39
Exercised		(32,065	)		37.72		$	351
Expired		(62	)		11.16
Outstanding at April 30, 2024		341,191			47.21					3.43	$	1,956
Exercisable at April 30, 2024		304,129		$	48.61					3.05	$	1,409

Restricted Stock Unit Activities

The following table summarizes restricted stock unit activities for the period indicated:

				Weighted-
				Average
				Grant-Date
	Shares			Fair Value
Unvested at January 31, 2024		2,432,640		$	82.54
Granted		604,990			66.21
Vested		(335,348	)		73.44
Forfeited		(89,977	)		148.33
Unvested at April 30, 2024		2,612,305		$	77.66