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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Jan. 31, 2023
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 | ​ | 2023 | ​ | 2022 | ​ | 2021
Cost of revenues |  | 940 |  | 732 |  | 319
Sales and marketing |  | 2,468 |  | 3,060 |  | 896
Research and development |  | 1,788 |  | 1,419 |  | 404
General and administrative |  | 8,471 |  | 5,806 |  | 4,694
Effect on net income |  | 13,667 |  | 11,017 |  | 6,313
​
Schedule of weighted-average assumptions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | January 31, |  | January 31, |  | January 31,
Year Ended | ​ | 2023 | ​ | 2022 | ​ | 2021
​ | ​ | ​ | ​ | ​ | ​ | ​
Expected dividend yield (%) |  | — |  | — | ​ | —
Expected volatility (%) |  | 29.2 |  | 27.8 | ​ | 26.4
Risk-free rate (%) |  | 2.4 |  | 0.7 | ​ | 0.7
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, 2021 | ​ | 1,147,720 | ​ | $ | 33.77 | ​ | 4.9 | ​ | $ | 28.1
Granted | ​ | 271,025 | ​ | $ | 65.03 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (90,166) | ​ | $ | 29.38 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (9,300) | ​ | $ | 53.94 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2022 |  | 1,319,279 | ​ | $ | 42.35 |  | 4.4 | ​ | $ | 41.5
Granted |  | 356,014 | ​ | $ | 61.09 |  |  | ​ |  |
Exercised |  | (63,890) | ​ | $ | 27.34 |  |  | ​ |  |
Forfeited |  | (17,970) | ​ | $ | 52.98 |  |  | ​ |  |
Balance at January 31, 2023 |  | 1,593,433 | ​ | $ | 45.54 |  | 4.1 | ​ | $ | 45.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at January 31, 2023 |  | 1,593,433 | ​ | $ | 45.54 |  | 4.1 | ​ | $ | 45.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at January 31, 2023 |  | 1,104,612 | ​ | $ | 40.35 |  | 3.5 | ​ | $ | 37.4
​
Summary of performance share units activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Options Outstanding | ​ | Options Exercisable
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​
​ | ​ | Weighted | ​ | ​ | ​ | Average | ​ | Weighted | ​ | ​
​ | ​ | Average | ​ | Number of | ​ | Remaining | ​ | Average | ​ | Number of
​ | ​ | Exercise | ​ | Stock | ​ | Contractual | ​ | Exercise | ​ | Stock
Range of Exercise Prices |  | Price |  | Options |  | Life (years) |  | Price |  | Options
$18.95 – $22.86 | ​ | $ | 21.75 |  | 148,153 |  | 0.9 | ​ | $ | 21.75 |  | 148,153
$26.24 – $27.85 | ​ | $ | 27.85 |  | 166,350 |  | 2.2 | ​ | $ | 27.85 |  | 166,350
$38.53 – $54.25 | ​ | $ | 39.53 |  | 625,310 |  | 3.7 | ​ | $ | 39.12 |  | 525,872
$56.31 – $68.49 | ​ | $ | 61.19 |  | 653,620 |  | 5.7 | ​ | $ | 61.11 |  | 264,237
​ | ​ | $ | 45.54 |  | 1,593,433 |  | 4.1 | ​ | $ | 40.35 |  | 1,104,612
​
Schedule of Non vested share activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Grant-Date
​ | ​ | Stock Options | ​ | Fair Value per
​ | ​ | Outstanding | ​ | Share
Balance at January 31, 2021 |  | 501,655 | ​ | $ | 9.52
Granted |  | 271,025 | ​ | $ | 16.77
Vested |  | (300,527) | ​ | $ | 11.42
Forfeited |  | (9,300) | ​ | $ | 13.54
Balance at January 31, 2022 |  | 462,853 | ​ | $ | 13.16
Granted |  | 356,014 | ​ | $ | 18.47
Vested |  | (313,186) | ​ | $ | 13.72
Forfeited |  | (16,860) | ​ | $ | 3.71
Balance at January 31, 2023 |  | 488,821 | ​ | $ | 16.11
​
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, 2021 |  | 755,873 | ​ | $ | 25.17 |  | 4.7 | ​ | $ | 44.0
Granted |  | 77,441 | ​ | $ | 88.11 |  |  | ​ |  |
Performance units issued |  | 44,296 | ​ | $ | 36.63 |  |  | ​ |  |
Exercised | ​ | (100,072) | ​ | $ | 9.66 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2022 |  | 777,538 | ​ | $ | 35.76 |  | 4.8 | ​ | $ | 57.4
Granted | ​ | 97,991 | ​ | $ | 64.98 | ​ | ​ | ​ | ​ | ​
Performance units issued | ​ | 39,704 | ​ | $ | 54.34 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2023 | ​ | 915,233 | ​ | $ | 38.41 | ​ | 4.5 | ​ | $ | 67.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at January 31, 2023 |  | 915,233 | ​ | $ | 38.41 |  | 4.5 | ​ | $ | 67.9
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at January 31, 2023 |  | 654,467 | ​ | $ | 26.77 |  | 3.1 | ​ | $ | 48.6
​
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, 2021 | ​ | 432,195 | ​ | $ | 19.98 | ​ | 4.7 | ​ | $ | 25.2
Granted | ​ | 50,099 | ​ | $ | 65.33 | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (71,314) | ​ | $ | 7.14 | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2022 |  | 410,980 | ​ | $ | 29.17 |  | 5.0 | ​ | $ | 30.3
Granted |  | 63,651 | ​ | $ | 61.53 |  |  | ​ |  |
Exercised | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​
Balance at January 31, 2023 |  | 474,631 | ​ | $ | 32.44 |  | 4.7 | ​ | $ | 35.2
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Vested or expected to vest at January 31, 2023 |  | 474,631 | ​ | $ | 32.44 |  | 4.7 | ​ | $ | 35.2
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at January 31, 2023 |  | 415,496 | ​ | $ | 28.26 |  | 4.1 | ​ | $ | 30.8
​
Schedule of cash settled restricted share unit plan activity | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | Number of | ​ | Remaining
​ | ​ | CRSUs | ​ | Contractual
​ | ​ | Outstanding | ​ | Life (years)
Balance at January 31, 2021 |  | 38,628 |  | 1.5
Granted |  | 12,776 |  |
Vested and settled in cash |  | (26,755) |  |
Forfeited |  | (221) |  |
Balance at January 31, 2022 |  | 24,428 |  | 1.4
Granted | ​ | 7,948 | ​ | ​
Vested and settled in cash | ​ | (17,719) | ​ | ​
Forfeited | ​ | (74) | ​ | ​
Balance at January 31, 2023 | ​ | 14,583 | ​ | 1.4
​ | ​ | ​ | ​ | ​
Non-vested at January 31, 2023 |  | 14,583 |  | 1.4
​

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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