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Stock-Based Compensation Plans (Tables) | 6 Months Ended
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Jul. 31, 2023
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,
​ | ​ | 2023 | ​ | 2022 | ​ | 2023 | ​ | 2022
Cost of revenues |  | 304 |  | 254 |  | 505 |  | 449
Sales and marketing |  | 1,417 |  | 675 |  | 2,287 |  | 1,160
Research and development |  | 580 |  | 490 |  | 965 |  | 857
General and administrative |  | 2,150 |  | 2,317 |  | 3,613 |  | 4,057
Effect on net income |  | 4,451 |  | 3,736 |  | 7,370 |  | 6,523
Schedule of weighted-average assumptions | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended
​ |  | July 31, |  | July 31,
​ | ​ | 2023 | ​ | 2022
​ | ​ | ​ | ​ | ​
Expected dividend yield (%) |  | — | ​ | —
Expected volatility (%) |  | 30.8 | ​ | 29.2
Risk-free rate (%) |  | 3.2 | ​ | 2.4
Expected option life (years) |  | 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 | ​ | $ | 80.10 |  | ​ | ​ |  | ​
Exercised |  | (201,511) | ​ | $ | 30.87 |  | ​ | ​ |  | ​
Forfeited |  | (13,323) | ​ | $ | 61.52 |  | ​ | ​ |  | ​
Balance at July 31, 2023 |  | 1,657,444 | ​ | $ | 51.83 |  | 4.3 | ​ | $ | 41.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at July 31, 2023 |  | 1,657,444 | ​ | $ | 51.83 |  | 4.3 | ​ | $ | 41.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at July 31, 2023 |  | 918,043 | ​ | $ | 41.39 |  | 3.3 | ​ | $ | 32.2
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 | ​ | $ | 106.36 | ​ | ​ | ​ | ​ | ​
Performance units issued | ​ | 68,005 | ​ | $ | 54.00 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (84,125) | ​ | $ | 11.19 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (2,475) | ​ | $ | 82.13 | ​ | ​ | ​ | ​ | ​
Balance at July 31, 2023 | ​ | 991,772 | ​ | $ | 54.07 | ​ | 5.0 | ​ | $ | 75.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at July 31, 2023 |  | 991,772 | ​ | $ | 54.07 |  | 5.0 | ​ | $ | 75.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at July 31, 2023 |  | 723,681 | ​ | $ | 36.95 |  | 3.7 | ​ | $ | 55.3
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 | ​ | $ | 80.19 |  | ​ | ​ |  | ​
Exercised | ​ | (53,898) | ​ | $ | 8.55 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (413) | ​ | $ | 60.89 | ​ | ​ | ​ | ​ | ​
Balance at July 31, 2023 |  | 482,094 | ​ | $ | 40.34 |  | 5.3 | ​ | $ | 36.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at July 31, 2023 |  | 482,094 | ​ | $ | 40.34 |  | 5.3 | ​ | $ | 36.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at July 31, 2023 |  | 361,598 | ​ | $ | 30.32 |  | 4.1 | ​ | $ | 27.7
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 | ​ | (6,129) | ​ | ​
Balance at July 31, 2023 | ​ | 16,333 | ​ | 2.0
​ | ​ | ​ | ​ | ​
Non-vested at July 31, 2023 |  | 16,333 |  | 2.0

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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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