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Stock-based Compensation (Tables)

9 Months Ended

Oct. 31, 2025

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 October 31,								Nine Months Ended October 31,
		2025				2024				2025				2024
		(in thousands)
Stock-based compensation:
Cost of revenue		$	658			$	899			$	2,389			$	2,339
Research and development			16,776				18,637				51,333				54,653
Selling, general and administrative			8,307				7,311				23,337				23,503
Total stock-based compensation		$	25,741			$	26,847			$	77,059			$	80,495

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 October 31,								Nine Months Ended October 31,
		2025				2024				2025				2024
Employee stock purchase plan awards:
Volatility			68	%			56	%			61	%			47	%
Risk-free interest rate			3.81	%			4.55	%			4.05	%			4.97	%
Expected term (years)		0.5				0.5				0.5				0.5
Dividend yield			0	%			0	%			0	%			0	%

Stock Option Activities

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

		Options 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, 2025			226,616			$	52.20
Exercised			(47,641	)			43.40					$	1,615
Expired			(16,619	)			75.00
Outstanding at October 31, 2025			162,356				52.45										2.26			$	5,556
Exercisable at October 31, 2025			162,343			$	52.46										2.26			$	5,555

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, 2025			2,645,379			$	71.84
Granted			1,359,268				74.30
Vested			(874,684	)			74.15
Forfeited			(221,545	)			86.96
Unvested at October 31, 2025			2,908,418			$	71.15

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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