Summary of Significant Accounting Policies - Stock-based Compensation (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Oct. 31, 2022

Oct. 31, 2021

Oct. 31, 2022

Oct. 31, 2021

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Total stock awards granted (in shares)

154,614

320,064

807,709

854,144

Aggregate grant date fair value

$ 1,162

$ 8,599

$ 16,924

$ 17,849

Dividend yield

0.00%

Stock-based compensation expense

$ 2,400

$ 2,600

$ 9,004

$ 6,382

Share-Based Payment Arrangement

Stock-based Compensation. During the nine months ended October 31, 2022, the Company granted performance stock awards (“PSUs”) and restricted stock awards (“RSUs”). The awards had a combined aggregate grant date fair value of $16.9 million. The PSUs will vest in fiscal year 2025, if at all, upon certification by the Compensation Committee of the Board of Directors of satisfaction of certain total stockholder return performance conditions over the three fiscal years commencing with fiscal year 2023. The RSUs will vest ratably, over periods of three years from the date of grant.

Stock-based compensation expense is recorded, net of actual forfeitures, for share-based compensation awards over the requisite service period using the straight-line method. For equity-classified share-based compensation awards, expense is recognized based on the grant-date fair value. For stock option grants, we use the Black-Scholes model to determine fair value. For grants of restricted stock units, the fair value of the grant is the market value of our stock at the date of issuance. For grants of performance-based restricted stock units, the fair value is the market value of our stock at the date of issuance adjusted for the market condition using a Monte Carlo model.

The following table sets forth the RSUs and PSUs granted during the three and nine months ended October 31, 2022 and 2021:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2022		2021		2022		2021
RSUs (1)	154,614		204,376		631,200		586,107
PSUs (2)	—		115,688		176,509		268,037
Total stock awards granted	154,614		320,064		807,709		854,144
Aggregate grant date fair value (in thousands)	$	1,162	$	8,599	$	16,924	$	17,849

(1)The RSUs issued during the three and nine months ended October 31, 2022 and 2021 are scheduled to vest ratably over periods of three years to four years from the date of grant with the exception of RSU grants issued to the Board of Directors.

(2)The weighted-average assumptions used in the Monte Carlo model for the PSUs granted during the nine months ended October 31, 2022 included expected volatility of 78.0%-80.0%, an expected term of 3 years and risk-free interest rate of 1.39%-2.58%. No dividend yield was included in the weighted-average assumptions for the PSUs granted during the nine months ended October 31, 2022. The weighted-average assumptions used in the Monte Carlo model for the PSUs granted during the nine months ended October 31, 2021 included expected volatility of 83.0%-87.0%, an expected term of 3 years and risk-free interest rate of 0.17%-.0.67%. No dividend yield was included in the weighted average assumptions for the PSUs granted during the nine months ended October 31, 2021.

For the three months ended October 31, 2022 and 2021, stock-based compensation expense was $2.4 million and $2.6 million, respectively. For the nine months ended October 31, 2022 and 2021, stock-based compensation expense was $9.0 million and $6.4 million, respectively.

Minimum

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting period

3 years

Maximum

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Vesting period

4 years

(RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

RSUs and PSUs (in shares)

154,614