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Stock-Based Compensation Plans (Tables) | 6 Months Ended
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Jul. 31, 2024
Stock-Based Compensation Plans |
Schedule of estimated stock-based compensation expense recognized in condensed consolidated statement of operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Six Months Ended
​ |  | July 31, |  | July 31, |  | July 31, |  | July 31,
​ | ​ | 2024 | ​ | 2023 | ​ | 2024 | ​ | 2023
Cost of revenues |  | 386 |  | 304 |  | 652 |  | 505
Sales and marketing |  | 1,768 |  | 1,417 |  | 2,980 |  | 2,287
Research and development |  | 740 |  | 580 |  | 1,235 |  | 965
General and administrative |  | 2,614 |  | 2,150 |  | 4,410 |  | 3,613
Effect on net income |  | 5,508 |  | 4,451 |  | 9,277 |  | 7,370
Schedule of weighted-average assumptions | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended
​ |  | July 31, |  | July 31,
​ | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​
Expected dividend yield (%) |  | — | ​ | —
Expected volatility (%) |  | 30.0 | ​ | 30.8
Risk-free rate (%) |  | 3.7 | ​ | 3.2
Expected option life (years) |  | 5 | ​ | 5
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Weighted- |  | Aggregate
​ | ​ | Number of | ​ | Weighted- | ​ | Average | ​ | Intrinsic
​ | ​ | Stock | ​ | Average | ​ | Remaining | ​ | Value
​ | ​ | Options | ​ | Exercise | ​ | Contractual | ​ | (in
​ | ​ | Outstanding | ​ | Price | ​ | Life (years) | ​ | millions)
Balance at January 31, 2024 |  | 1,568,551 | ​ | $ | 52.31 |  | 3.9 | ​ | $ | 54.8
Granted |  | 276,361 | ​ | $ | 89.64 |  | ​ | ​ |  | ​
Exercised |  | (215,199) | ​ | $ | 34.91 |  | ​ | ​ |  | ​
Forfeited |  | (6,892) | ​ | $ | 73.84 |  | ​ | ​ |  | ​
Balance at July 31, 2024 |  | 1,622,821 | ​ | $ | 60.37 |  | 4.2 | ​ | $ | 69.2
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at July 31, 2024 |  | 1,622,821 | ​ | $ | 60.37 |  | 4.2 | ​ | $ | 69.2
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at July 31, 2024 |  | 923,010 | ​ | $ | 48.78 |  | 3.1 | ​ | $ | 50.0
Schedule of performance share units activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |  | Weighted- |  | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Intrinsic
​ | ​ | Number of | ​ | Granted | ​ | Remaining | ​ | Value
​ | ​ | PSUs | ​ | Date Fair | ​ | Contractual | ​ | (in
​ | ​ | Outstanding | ​ | Value | ​ | Life (years) | ​ | millions)
Balance at January 31, 2024 |  | 988,543 | ​ | $ | 53.81 |  | 4.5 | ​ | $ | 86.3
Granted | ​ | 92,873 | ​ | $ | 110.99 | ​ | ​ | ​ | ​ | ​
Performance units issued | ​ | 40,477 | ​ | $ | 80.99 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (103,504) | ​ | $ | 13.62 | ​ | ​ | ​ | ​ | ​
Balance at July 31, 2024 | ​ | 1,018,389 | ​ | $ | 63.77 | ​ | 5.1 | ​ | $ | 104.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at July 31, 2024 |  | 1,018,389 | ​ | $ | 63.77 |  | 5.1 | ​ | $ | 104.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at July 31, 2024 |  | 732,391 | ​ | $ | 48.27 |  | 3.8 | ​ | $ | 75.4
Schedule of restricted share units activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |  | Weighted- |  | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Intrinsic
​ | ​ | Number of | ​ | Granted | ​ | Remaining | ​ | Value
​ | ​ | RSUs | ​ | Date Fair | ​ | Contractual | ​ | (in
​ | ​ | Outstanding | ​ | Value | ​ | Life (years) | ​ | millions)
Balance at January 31, 2024 |  | 482,094 | ​ | $ | 40.19 |  | 4.8 | ​ | $ | 42.1
Granted |  | 62,597 | ​ | $ | 89.64 |  | ​ | ​ |  | ​
Exercised | ​ | (51,752) | ​ | $ | 11.27 | ​ | ​ | ​ | ​ | ​
Balance at July 31, 2024 |  | 492,939 | ​ | $ | 49.12 |  | 5.5 | ​ | $ | 50.8
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at July 31, 2024 |  | 492,939 | ​ | $ | 49.12 |  | 5.5 | ​ | $ | 50.8
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at July 31, 2024 |  | 367,938 | ​ | $ | 38.29 |  | 4.3 | ​ | $ | 37.9
Schedule of cash settled restricted share unit plan activity | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Remaining
​ | ​ | CRSUs | ​ | Contractual
​ | ​ | Outstanding | ​ | Life (years)
Balance at January 31, 2024 |  | 11,370 |  | 1.8
Granted | ​ | 8,579 | ​ | ​
Vested and settled in cash | ​ | (3,430) | ​ | ​
Forfeited | ​ | (7) | ​ | ​
Balance at July 31, 2024 | ​ | 16,512 | ​ | 2.1
​ | ​ | ​ | ​ | ​
Non-vested at July 31, 2024 |  | 16,512 |  | 2.1

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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