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Pay vs Performance Disclosure - USD ($) | 12 Months Ended
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Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2022 | Jan. 31, 2021
Pay vs Performance Disclosure |  |  |  |
Pay vs Performance Disclosure, Table | PAY VERSUS PERFORMANCE We are providing the following information about the relationship between “compensation actually paid” to our named executive officers and company financial performance, as required by or defined in Section 953(a) of the Dodd-Frank Act and Item 402(v) of Regulation S-K. For further information regarding our compensation philosophy, and in particular, how we align executive compensation with company financial performance, refer to “Executive Compensation – Compensation Discussion and Analysis,” above.
|  |  |  |  |  |  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On: |  |  |  |  |  |  |
Fiscal Year |  | Summary Compensation Table Total for PEO ($)(1) |  |  | Compensation Actually Paid to PEO ($)(2) |  |  | Average Summary Compensation Table Total for Non-PEO NEOs ($)(3) |  |  | Average Compensation Actually Paid to Non-PEO NEOs ($)(4) |  |  | Total Shareholder Return – AMBA ($)(5) |  |  | Peer Group Total Shareholder Return ($)(6) |  |  | Net Income ($ Millions) (7) |  |  | Revenue ($ Millions) (8) |
2024 |  |  | 5,808,060 |  |  |  | (778,845 | ) |  |  | 2,781,316 |  |  |  | (358,579 | ) |  |  | 88.87 |  |  |  | 238.05 |  |  |  | (169.4 | ) |  |  | 226.5 |
2023 |  |  | 5,904,850 |  |  |  | (5,223,250 | ) |  |  | 3,702,220 |  |  |  | (483,113 | ) |  |  | 151.91 |  |  |  | 180.82 |  |  |  | (65.4 | ) |  |  | 337.6 |
2022 |  |  | 6,205,867 |  |  |  | 21,197,673 |  |  |  | 2,592,611 |  |  |  | 9,835,394 |  |  |  | 236.98 |  |  |  | 209.94 |  |  |  | (26.4 | ) |  |  | 331.9 |
2021 |  |  | 5,596,549 |  |  |  | 14,765,032 |  |  |  | 2,212,215 |  |  |  | 5,755,522 |  |  |  | 159.55 |  |  |  | 170.15 |  |  |  | (59.8 | ) |  |  | 222.9 |
(1) | The dollar amounts reported in this column are the amounts of total compensation reported for the Company’s principal executive officer, or PEO, Dr. Feng-Ming (Fermi) Wang, for each corresponding fiscal year in the “Total” column of the Summary Compensation Table. Refer to “Executive Compensation – Summary Compensation Table for Fiscal Year 2024,” above.
(2) | Compensation actually paid does not mean that our PEO was actually paid those amounts in the listed fiscal year, but this is a dollar amount derived from the starting point of the compensation reported in the “Total” column of the Summary Compensation Table, under the methodology prescribed under the SEC’s rules, as shown in the reconciliation table below.
The following table presents a reconciliation of total compensation paid to the PEO for each year as reported in the Summary Compensation Table, above, to the compensation actually paid to the PEO, which was computed in accordance with Item 402(v) of Regulation S-K, as reported in the Pay Versus Performance table, above.
Fiscal Year |  | Summary Compensation Table Total for PEO ($) |  |  | Exclusion of Stock Awards for PEO ($) |  |  | Inclusion of Equity Values for PEO ($) |  |  | Equals Compensation Actually Paid to PEO ($) |
2024 |  |  | 5,808,060 |  |  |  | (5,050,710 | ) |  |  | (1,536,195 | ) |  |  | (778,845 | )
2023 |  |  | 5,904,850 |  |  |  | (5,343,850 | ) |  |  | (5,784,250 | ) |  |  | (5,223,250 | )
2022 |  |  | 6,205,867 |  |  |  | (4,905,867 | ) |  |  | 19,897,673 |  |  |  | 21,197,673 |
2021 |  |  | 5,596,549 |  |  |  | (4,717,849 | ) |  |  | 13,886,332 |  |  |  | 14,765,032 |
The amounts in the Inclusion of Equity Values for PEO column in the table above are derived from the amounts set forth in the following table:
Fiscal Year |  | Fair Value of Unvested Current Year Awards at FYE for PEO ($) |  |  | Change in Value of Prior Year Awards Vesting During the Year for PEO ($) |  |  | Change in Value of Unvested Equity from Prior Years for PEO ($) |  |  | Adjust for Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year for PEO ($) |  |  | Fair Value at Last Day of Prior Year of Equity Awards Forfeited during Year for PEO ($) |  |  | Total- Inclusion of Equity Values for PEO ($) |
2024 |  |  | 2,486,054 |  |  |  | (326,581 | ) |  |  | (4,172,877 | ) |  |  | 477,210 |  |  |  | — |  |  |  | (1,536,195 | )
2023 |  |  | 4,221,283 |  |  |  | (1,451,046 | ) |  |  | (9,054,092 | ) |  |  | 499,604 |  |  |  | — |  |  |  | (5,784,250 | )
2022 |  |  | 5,627,028 |  |  |  | 1,909,656 |  |  |  | 11,606,228 |  |  |  | 754,761 |  |  |  | — |  |  |  | 19,897,673 |
2021 |  |  | 8,472,740 |  |  |  | 41,072 |  |  |  | 4,664,085 |  |  |  | 708,435 |  |  |  | — |  |  |  | 13,886,332 |
(3) | The dollar amounts reported in this column represent the average of the amounts reported for the Company’s NEOs other than the Company’s PEO (the “Non-PEO NEOs”), for each corresponding fiscal year in the “Total” column of the Summary Compensation Table. Refer to “Executive Compensation – Summary Compensation Table for Fiscal Year 2024” above and the Summary Compensation Tables for fiscal years 2023 - 2021 contained in the Company’s previously filed proxy statements. The non-PEO NEOs included for purposes of calculating the average amounts in each applicable year are as follows: (i) for fiscal year 2024, Les Kohn, Brian White, Chan Lee, and John Ju; (ii) for fiscal year 2023, Les Kohn, Brian White, Chan Lee, John Ju, and John Young; (iii) for fiscal year 2022, Les Kohn, Casey Eichler, Chan Lee, John Ju, and John Young; and (iv) for fiscal year 2021, Les Kohn, Casey Eichler, Michael Chen, and Christopher Day.
(4) | This figure is the average of compensation actually paid for the Non-PEO NEOs in each listed fiscal year. Compensation actually paid does not mean that these Non-PEO NEOs were actually paid those amounts in the listed year, but this is a dollar amount derived from the starting point of Summary Compensation Table total compensation under the methodology prescribed under the SEC’s rules, as shown in the reconciliation table below.
The following table presents a reconciliation of average compensation paid to Non-PEO NEOs for each year as reported in the Summary Compensation Table above and in the Company’s previously filed proxy statements to the average compensation actually paid to the Non-PEO NEOs, which was computed in accordance with Item 402(v) of Regulation S-K, as reported in the Pay Versus Performance table, above.
Fiscal Year |  | Average Summary Compensation Table Total for Non-PEO NEOs \($) |  |  | Average Exclusion of Stock Awards for Non-PEO NEOs ($) |  |  | Average Inclusion of Equity Values for Non-PEO NEOs ($) |  |  | Equals Average Compensation Actually Paid to Non-PEO NEOs ($) |
2024 |  |  | 2,781,316 |  |  |  | (2,359,584 | ) |  |  | (780,347 | ) |  |  | (358,579 | )
2023 |  |  | 3,702,220 |  |  |  | (3,324,397 | ) |  |  | (860,936 | ) |  |  | (483,113 | )
2022 |  |  | 2,592,611 |  |  |  | (1,956,274 | ) |  |  | 9,199,057 |  |  |  | 9,835,394 |
2021 |  |  | 2,212,215 |  |  |  | (1,743,625 | ) |  |  | 5,286,932 |  |  |  | 5,755,522 |
The amounts in the Inclusion of Equity Values for Non-PEO NEOs column in the table above are derived from the amounts set forth in the following table:
Fiscal Year |  | Average Fair Value of Unvested Current Year Awards at FYE for Non-PEO NEOs ($) |  |  | Average Change in Value of Prior Year Awards Vesting During the Year for Non-PEO NEOs ($) |  |  | Average Change in Value of Unvested Equity from Prior Years for Non-PEO NEOs ($) |  |  | Average Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year for Non-PEO NEOs ($) |  |  | Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited during Year for Non-PEO NEOs ($) |  |  | Average Total- Inclusion of Equity Values for Non-PEO NEOs ($) |
2024 |  |  | 1,161,428 |  |  |  | (261,971 | ) |  |  | (1,883,274 | ) |  |  | 203,470 |  |  |  | — |  |  |  | (780,347 | )
2023 |  |  | 2,779,010 |  |  |  | (615,781 | ) |  |  | (3,238,882 | ) |  |  | 214,717 |  |  |  | — |  |  |  | (860,936 | )
2022 |  |  | 2,243,894 |  |  |  | 1,303,642 |  |  |  | 5,350,587 |  |  |  | 300,933 |  |  |  | — |  |  |  | 9,199,057 |
2021 |  |  | 3,131,381 |  |  |  | 26,321 |  |  |  | 1,867,424 |  |  |  | 261,806 |  |  |  | — |  |  |  | 5,286,932 |
(5) | Total shareholder return is calculated by assuming that a $100 investment was made on the last trading day prior to the earliest fiscal year reported in this table and reinvesting all dividends until the last day of each reported fiscal year.
(6) | The peer group used is the PHLX Semiconductor Sector Index (SOX), as used in the performance graph included in our annual report. Total shareholder return is calculated by assuming that a $100 investment was made on the last trading day prior to the earliest fiscal year reported in this table and reinvesting all dividends until the last day of each reported fiscal year.
(7) | The dollar amounts reported are the Company’s net income reflected in the Company’s audited financial statements.
(8) | The metric in this column, the Company’s revenue as reflected in the Company’s audited financial statements, in our assessment, represents the most important Company financial performance measure (that is not otherwise disclosed in this table) used to link compensation actually paid to company performance for the NEOs for all years presented. In particular, 1/3 of the annual bonus program for NEOs is based on the revenue metric. Other key financial performance measures linked to executive compensation are described under “Financial Performance Measures,” below. For additional information regarding actual performance, peer group, and executive compensation for the most recently completed fiscal year, see “Executive Compensation – Compensation Discussion and Analysis,” above.
Company Selected Measure Name | Revenue |  |  |
Named Executive Officers, Footnote | The non-PEO NEOs included for purposes of calculating the average amounts in each applicable year are as follows: (i) for fiscal year 2024, Les Kohn, Brian White, Chan Lee, and John Ju; (ii) for fiscal year 2023, Les Kohn, Brian White, Chan Lee, John Ju, and John Young; (iii) for fiscal year 2022, Les Kohn, Casey Eichler, Chan Lee, John Ju, and John Young; and (iv) for fiscal year 2021, Les Kohn, Casey Eichler, Michael Chen, and Christopher Day. |  |  |
Peer Group Issuers, Footnote | The peer group used is the PHLX Semiconductor Sector Index (SOX), as used in the performance graph included in our annual report. Total shareholder return is calculated by assuming that a $100 investment was made on the last trading day prior to the earliest fiscal year reported in this table and reinvesting all dividends until the last day of each reported fiscal year. |  |  |
PEO Total Compensation Amount | $ 5,808,060 | $ 5,904,850 | $ 6,205,867 | $ 5,596,549
PEO Actually Paid Compensation Amount | $ (778,845) | (5,223,250) | 21,197,673 | 14,765,032
Adjustment To PEO Compensation, Footnote | The following table presents a reconciliation of total compensation paid to the PEO for each year as reported in the Summary Compensation Table, above, to the compensation actually paid to the PEO, which was computed in accordance with Item 402(v) of Regulation S-K, as reported in the Pay Versus Performance table, above.
Fiscal Year |  | Summary Compensation Table Total for PEO ($) |  |  | Exclusion of Stock Awards for PEO ($) |  |  | Inclusion of Equity Values for PEO ($) |  |  | Equals Compensation Actually Paid to PEO ($) |
2024 |  |  | 5,808,060 |  |  |  | (5,050,710 | ) |  |  | (1,536,195 | ) |  |  | (778,845 | )
2023 |  |  | 5,904,850 |  |  |  | (5,343,850 | ) |  |  | (5,784,250 | ) |  |  | (5,223,250 | )
2022 |  |  | 6,205,867 |  |  |  | (4,905,867 | ) |  |  | 19,897,673 |  |  |  | 21,197,673 |
2021 |  |  | 5,596,549 |  |  |  | (4,717,849 | ) |  |  | 13,886,332 |  |  |  | 14,765,032 |
The amounts in the Inclusion of Equity Values for PEO column in the table above are derived from the amounts set forth in the following table:
Fiscal Year |  | Fair Value of Unvested Current Year Awards at FYE for PEO ($) |  |  | Change in Value of Prior Year Awards Vesting During the Year for PEO ($) |  |  | Change in Value of Unvested Equity from Prior Years for PEO ($) |  |  | Adjust for Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year for PEO ($) |  |  | Fair Value at Last Day of Prior Year of Equity Awards Forfeited during Year for PEO ($) |  |  | Total- Inclusion of Equity Values for PEO ($) |
2024 |  |  | 2,486,054 |  |  |  | (326,581 | ) |  |  | (4,172,877 | ) |  |  | 477,210 |  |  |  | — |  |  |  | (1,536,195 | )
2023 |  |  | 4,221,283 |  |  |  | (1,451,046 | ) |  |  | (9,054,092 | ) |  |  | 499,604 |  |  |  | — |  |  |  | (5,784,250 | )
2022 |  |  | 5,627,028 |  |  |  | 1,909,656 |  |  |  | 11,606,228 |  |  |  | 754,761 |  |  |  | — |  |  |  | 19,897,673 |
2021 |  |  | 8,472,740 |  |  |  | 41,072 |  |  |  | 4,664,085 |  |  |  | 708,435 |  |  |  | — |  |  |  | 13,886,332 |
Non-PEO NEO Average Total Compensation Amount | $ 2,781,316 | 3,702,220 | 2,592,611 | 2,212,215
Non-PEO NEO Average Compensation Actually Paid Amount | $ (358,579) | (483,113) | 9,835,394 | 5,755,522
Adjustment to Non-PEO NEO Compensation Footnote | The following table presents a reconciliation of average compensation paid to Non-PEO NEOs for each year as reported in the Summary Compensation Table above and in the Company’s previously filed proxy statements to the average compensation actually paid to the Non-PEO NEOs, which was computed in accordance with Item 402(v) of Regulation S-K, as reported in the Pay Versus Performance table, above.
Fiscal Year |  | Average Summary Compensation Table Total for Non-PEO NEOs \($) |  |  | Average Exclusion of Stock Awards for Non-PEO NEOs ($) |  |  | Average Inclusion of Equity Values for Non-PEO NEOs ($) |  |  | Equals Average Compensation Actually Paid to Non-PEO NEOs ($) |
2024 |  |  | 2,781,316 |  |  |  | (2,359,584 | ) |  |  | (780,347 | ) |  |  | (358,579 | )
2023 |  |  | 3,702,220 |  |  |  | (3,324,397 | ) |  |  | (860,936 | ) |  |  | (483,113 | )
2022 |  |  | 2,592,611 |  |  |  | (1,956,274 | ) |  |  | 9,199,057 |  |  |  | 9,835,394 |
2021 |  |  | 2,212,215 |  |  |  | (1,743,625 | ) |  |  | 5,286,932 |  |  |  | 5,755,522 |
The amounts in the Inclusion of Equity Values for Non-PEO NEOs column in the table above are derived from the amounts set forth in the following table:
Fiscal Year |  | Average Fair Value of Unvested Current Year Awards at FYE for Non-PEO NEOs ($) |  |  | Average Change in Value of Prior Year Awards Vesting During the Year for Non-PEO NEOs ($) |  |  | Average Change in Value of Unvested Equity from Prior Years for Non-PEO NEOs ($) |  |  | Average Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year for Non-PEO NEOs ($) |  |  | Average Fair Value at Last Day of Prior Year of Equity Awards Forfeited during Year for Non-PEO NEOs ($) |  |  | Average Total- Inclusion of Equity Values for Non-PEO NEOs ($) |
2024 |  |  | 1,161,428 |  |  |  | (261,971 | ) |  |  | (1,883,274 | ) |  |  | 203,470 |  |  |  | — |  |  |  | (780,347 | )
2023 |  |  | 2,779,010 |  |  |  | (615,781 | ) |  |  | (3,238,882 | ) |  |  | 214,717 |  |  |  | — |  |  |  | (860,936 | )
2022 |  |  | 2,243,894 |  |  |  | 1,303,642 |  |  |  | 5,350,587 |  |  |  | 300,933 |  |  |  | — |  |  |  | 9,199,057 |
2021 |  |  | 3,131,381 |  |  |  | 26,321 |  |  |  | 1,867,424 |  |  |  | 261,806 |  |  |  | — |  |  |  | 5,286,932 |
Compensation Actually Paid vs. Total Shareholder Return | Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Total Shareholder Return (“TSR”) The following chart sets forth the relationship between compensation actually paid (or CAP) to our PEO, the average of compensation actually paid to our Non-PEO NEOs, and the Company’s cumulative TSR as well as the PHLX Semiconductor Sector Index cumulative TSR for the fiscal years indicated. |  |  |
Compensation Actually Paid vs. Net Income | Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Net Income (Loss) The following chart sets forth the relationship between compensation actually paid to our PEO, the average of compensation actually paid to our Non-PEO NEOs, and our net income (loss) during the four most recently completed fiscal years. |  |  |
Compensation Actually Paid vs. Company Selected Measure | Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Revenue The following chart sets forth the relationship between compensation actually paid to our PEO, the average of compensation actually paid to our Non-PEO NEOs, and our revenue during the three most recently completed fiscal years. |  |  |
Total Shareholder Return Vs Peer Group | Relationship Between PEO and Non-PEO NEO Compensation Actually Paid and Total Shareholder Return (“TSR”) The following chart sets forth the relationship between compensation actually paid (or CAP) to our PEO, the average of compensation actually paid to our Non-PEO NEOs, and the Company’s cumulative TSR as well as the PHLX Semiconductor Sector Index cumulative TSR for the fiscal years indicated. |  |  |
Tabular List, Table | Financial Performance Measures As described in further detail in “Executive Compensation – Compensation Discussion and Analysis” above, our executive compensation program incorporates various Company financial performance metrics. Such metrics are used in both our long-term and short-term incentive awards and are selected with the objective of incentivizing our PEO and Non-PEO NEOs to increase the long-term value of our company for shareholders. The three most important financial performance measures used in fiscal year 2023 to link executive compensation actually paid to our PEO and Non-PEO NEOs, for the most recently completed fiscal year, to our financial performance are as follows (listed in no particular order of importance):
|  | Most Important Financial Performance Measures
|  | Revenue
|  | Non-GAAP operating profit (i)
|  | Total Shareholder Return relative to the Russell 2000 Index
(i) | Refers to our GAAP operating income less the impact of stock-based compensation and the associated tax impact and excluding bonus accruals.
Total Shareholder Return Amount | $ 88.87 | 151.91 | 236.98 | 159.55
Peer Group Total Shareholder Return Amount | 238.05 | 180.82 | 209.94 | 170.15
Net Income (Loss) | $ (169,400,000) | $ (65,400,000) | $ (26,400,000) | $ (59,800,000)
Company Selected Measure Amount | 226,500,000 | 337,600,000 | 331,900,000 | 222,900,000
PEO Name | Dr. Feng-Ming (Fermi) Wang |  |  |
Measure:: 1 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Revenue |  |  |
Measure:: 2 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Non-GAAP operating profit |  |  |
Measure:: 3 |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Name | Total Shareholder Return relative to the Russell 2000 Index |  |  |
PEO | Exclusion Of Stock Awards [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ (5,050,710) | $ (5,343,850) | $ (4,905,867) | $ (4,717,849)
PEO | Inclusion Of Equity Values [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (1,536,195) | (5,784,250) | 19,897,673 | 13,886,332
PEO | Fair Value of Unvested Current Year Awards at FYE [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 2,486,054 | 4,221,283 | 5,627,028 | 8,472,740
PEO | Change in Value of Prior Year Awards Vesting During the Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (326,581) | (1,451,046) | 1,909,656 | 41,072
PEO | Change in Value of Unvested Equity from Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (4,172,877) | (9,054,092) | 11,606,228 | 4,664,085
PEO | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 477,210 | 499,604 | 754,761 | 708,435
PEO | Fair Value at Last Day of Prior Year of Equity Awards Forefeited during Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 0 | 0 | 0 | 0
Non-PEO NEO | Exclusion Of Stock Awards [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (2,359,584) | (3,324,397) | (1,956,274) | (1,743,625)
Non-PEO NEO | Inclusion Of Equity Values [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (780,347) | (860,936) | 9,199,057 | 5,286,932
Non-PEO NEO | Fair Value of Unvested Current Year Awards at FYE [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 1,161,428 | 2,779,010 | 2,243,894 | 3,131,381
Non-PEO NEO | Change in Value of Prior Year Awards Vesting During the Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (261,971) | (615,781) | 1,303,642 | 26,321
Non-PEO NEO | Change in Value of Unvested Equity from Prior Years [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | (1,883,274) | (3,238,882) | 5,350,587 | 1,867,424
Non-PEO NEO | Fair Value as of Vesting Date of Equity Awards Granted and Vested in the Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | 203,470 | 214,717 | 300,933 | 261,806
Non-PEO NEO | Fair Value at Last Day of Prior Year of Equity Awards Forefeited during Year [Member] |  |  |  |
Pay vs Performance Disclosure |  |  |  |
Adjustment to Compensation, Amount | $ 0 | $ 0 | $ 0 | $ 0

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