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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Jan. 31, 2025
Stock-Based Compensation Plans |
Schedule of estimated stock-based compensation expense recognized in condensed consolidated statement of operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | January 31, |  | January 31, |  | January 31,
Year Ended | ​ | 2025 | ​ | 2024 | ​ | 2023
Cost of revenues |  | 1,407 |  | 1,128 |  | 940
Sales and marketing |  | 6,440 |  | 5,197 |  | 2,468
Research and development |  | 2,744 |  | 2,138 |  | 1,788
General and administrative |  | 9,371 |  | 8,017 |  | 8,471
Effect on net income |  | 19,962 |  | 16,480 |  | 13,667
Schedule of weighted-average assumptions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | January 31, |  | January 31, |  | January 31,
Year Ended | ​ | 2025 | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Expected dividend yield (%) |  | — |  | — | ​ | —
Expected volatility (%) |  | 30.0 |  | 30.8 | ​ | 29.2
Risk-free rate (%) |  | 3.6 |  | 3.2 | ​ | 2.4
Expected option life (years) |  | 5 |  | 5 | ​ | 5
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Weighted- |  | ​
​ | ​ | Number of | ​ | Weighted- | ​ | Average | ​ | Aggregate
​ | ​ | Stock | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | Options | ​ | Exercise | ​ | Contractual | ​ | Value
​ | ​ | Outstanding | ​ | Price | ​ | Life (years) | ​ | (in millions)
Balance at January 31, 2023 | ​ | 1,593,433 | ​ | $ | 45.54 | ​ | 4.1 | ​ | $ | 45.7
Granted | ​ | 278,845 | ​ | $ | 79.80 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (285,808) | ​ | $ | 33.06 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (17,919) | ​ | $ | 62.30 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2024 |  | 1,568,551 | ​ | $ | 52.31 |  | 3.9 | ​ | $ | 54.8
Granted |  | 280,658 | ​ | $ | 88.82 |  | ​ | ​ |  | ​
Exercised |  | (332,109) | ​ | $ | 37.25 |  | ​ | ​ |  | ​
Forfeited |  | (15,199) | ​ | $ | 77.06 |  | ​ | ​ |  | ​
Balance at January 31, 2025 |  | 1,501,901 | ​ | $ | 61.06 |  | 3.8 | ​ | $ | 91.6
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at January 31, 2025 |  | 1,501,901 | ​ | $ | 61.06 |  | 3.8 | ​ | $ | 91.6
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at January 31, 2025 |  | 1,091,499 | ​ | $ | 54.70 |  | 3.3 | ​ | $ | 73.5
Schedule of unvested stock options activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant-Date
​ | ​ | Stock Options | ​ | Fair Value per
​ | ​ | Outstanding | ​ | Share
Balance at January 31, 2023 |  | 488,821 | ​ | $ | 16.11
Granted |  | 278,845 | ​ | $ | 26.19
Vested |  | (303,628) | ​ | $ | 17.74
Forfeited |  | (17,485) | ​ | $ | 18.29
Balance at January 31, 2024 | ​ | 446,553 | ​ | $ | 20.67
Granted | ​ | 280,658 | ​ | $ | 29.53
Vested | ​ | (301,921) | ​ | $ | 21.88
Forfeited | ​ | (14,888) | ​ | $ | 25.16
Balance at January 31, 2025 |  | 410,402 | ​ | $ | 25.21
Schedule of performance share units activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |  | Weighted- |  | ​
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Aggregate
​ | ​ | Number of | ​ | Granted | ​ | Remaining | ​ | Intrinsic
​ | ​ | PSUs | ​ | Date Fair | ​ | Contractual | ​ | Value
​ | ​ | Outstanding | ​ | Value | ​ | Life (years) | ​ | (in millions)
Balance at January 31, 2023 |  | 915,233 | ​ | $ | 38.41 |  | 4.5 | ​ | $ | 67.9
Granted | ​ | 95,134 | ​ | $ | 105.96 | ​ | ​ | ​ | ​ | ​
Performance units issued | ​ | 68,005 | ​ | $ | 53.80 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (87,354) | ​ | $ | 14.29 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (2,475) | ​ | $ | 81.82 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2024 | ​ | 988,543 | ​ | $ | 53.81 | ​ | 4.5 | ​ | $ | 86.3
Granted | ​ | 92,873 | ​ | $ | 109.77 | ​ | ​ | ​ | ​ | ​
Performance units issued | ​ | 40,477 | ​ | $ | 80.11 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (109,820) | ​ | $ | 19.88 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (3,428) | ​ | $ | 80.66 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2025 | ​ | 1,008,645 | ​ | $ | 62.92 | ​ | 4.6 | ​ | $ | 123.1
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at January 31, 2025 |  | 1,008,645 | ​ | $ | 62.92 |  | 4.6 | ​ | $ | 123.1
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at January 31, 2025 |  | 726,075 | ​ | $ | 47.45 |  | 3.2 | ​ | $ | 88.6
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, 2023 |  | 474,631 | ​ | $ | 32.44 |  | 4.7 | ​ | $ | 35.2
Granted |  | 61,774 | ​ | $ | 79.89 |  | ​ | ​ |  | ​
Exercised | ​ | (53,898) | ​ | $ | 8.52 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (413) | ​ | $ | 60.66 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2024 |  | 482,094 | ​ | $ | 40.19 |  | 4.8 | ​ | $ | 42.1
Granted | ​ | 62,597 | ​ | $ | 88.66 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (54,173) | ​ | $ | 13.36 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (829) | ​ | $ | 70.74 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2025 | ​ | 489,689 | ​ | $ | 48.48 | ​ | 5.0 | ​ | $ | 59.8
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at January 31, 2025 |  | 489,689 | ​ | $ | 48.48 |  | 5.0 | ​ | $ | 59.8
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at January 31, 2025 |  | 427,613 | ​ | $ | 43.14 |  | 4.4 | ​ | $ | 52.2
Schedule of cash settled restricted share unit plan activity | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Remaining
​ | ​ | CRSUs | ​ | Contractual
​ | ​ | Outstanding | ​ | Life (years)
Balance at January 31, 2023 |  | 14,583 |  | 1.4
Granted | ​ | 7,879 | ​ | ​
Vested and settled in cash | ​ | (11,092) | ​ | ​
Balance at January 31, 2024 | ​ | 11,370 | ​ | 1.8
Granted | ​ | 8,579 | ​ | ​
Vested and settled in cash | ​ | (7,333) | ​ | ​
Forfeited | ​ | (599) | ​ | ​
Balance at January 31, 2025 | ​ | 12,017 | ​ | 1.7
​ | ​ | ​ | ​ | ​
Non-vested at January 31, 2025 |  | 12,017 |  | 1.7

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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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