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SHARE-BASED COMPENSATION | 3 Months Ended
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Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
SHARE-BASED COMPENSATION | NOTE 4 – SHARE-BASED COMPENSATION On September 12, 2019, the Company's stockholders approved the 2019 Equity Incentive Plan (2019 Plan), which replaced the Company's 2007 Equity Incentive Plan, as amended (Amended 2007 Plan). The 2019 Plan permits the granting of incentive and nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, and other stock awards, collectively referred to as "share-based awards". On September 10, 2020, the Company's stockholders approved an amendment and restatement of the 2019 Equity Incentive Plan (2019 First Amended Plan) to increase the number of shares reserved for issua nce by 4,700,000 s hares, establish a one-year minimum vesting requirement for awards granted on or after September 10, 2020, and change the fungible share counting ratio used to calculate the increase or reduction in the number of shares available for issuance under the 2019 First Amended Plan. On August 24, 2022, the Company's stockholders approved an amendment and restatement of the 2019 Equity Incentive Plan (2019 Second Amended Plan) to increase the number of shares reserved for issuance by 7,000,000 shares, and change the fungible share counting ratio used to calculate the increase or reduction in the number of shares available for issuance under the 2019 Second Amended Plan. On September 14, 2023, the Company's stockholders approved an amendment and restatement to the 2019 First Amended Plan (2019 Third Amended Plan) to further increase the number of shares reserved for issuance by 5,900,000 shares and changed the fungible share counting ratio used to calculate the increase or reduction in the number of shares available for issuance under the 2019 Third Amended Plan. On September 12, 2024, the Company's stockholders approved an amendment and restatement to the 2019 First Amended Plan (2019 Fourth Amended Plan) to further increase the number of shares reserved for issuance by 3,400,000. At September 12, 2024, the effective date of the 2019 Fourth Amended Plan, there was a total of 7,947,545 shares reserved for issuance under the 2019 Fourth Amended Plan, which consisted of 3,400,000 new shares plus 4,547,545 shares that remained available for grant under the 2019 Third Amended Plan. The Company refers to the 2019 Plan, 2019 First Amended Plan, 2019 Second Amended Plan, 2019 Third Amended Plan and 2019 Fourth Amended Plan collectively as the "Amended 2019 Plan". As of June 30, 2025, an aggregate of 4,484,849 shares remained available for grant under the Amended 2019 Plan. Periodically, the Company grants share-based awards to employees, executive officers, and directors of the Company and its subsidiaries. Additionally, the Company periodically grants performance-based restricted stock units to certain executive officers that vest based upon the Company's total shareholder return as compared to the Russell 2000 Index over a three-year period. The performance-based restricted stock units are valued using the Monte Carlo Simulation model. The measurement and recognition of compensation expense is based on estimated fair values for all share-based payment awards made to its employees and directors. Share-based award grants are generally measured at fair value on the date of grant based on the number of shares granted and the quoted price of the Company's common stock. Such value is recognized as a cost of revenue or an operating expense over the corresponding vesting period. The following is a summary of share-based compensation expense including restricted stock units and performance-based restricted stock units granted pursuant to the Company's Amended 2007 Plan and the Amended 2019 Plan, and employee stock purchases made under the Company's 2011 Amended and Restated Employee Stock Purchase Plan (ESPP), based on estimated fair values within the applicable cost and expense lines identified below (in thousands):
| Three Months Ended |  |
| June 30, |  |
| 2025 |  | 2024 |  |  |  |
Cost of product revenue | $ | 413 |  |  | $ | 431 |  |  |  |  |
Cost of service revenue | 2,747 |  |  | 2,889 |  |  |  |  |
Research and development | 5,532 |  |  | 5,886 |  |  |  |  |
Sales and marketing | 6,889 |  |  | 7,504 |  |  |  |  |
General and administrative | 4,378 |  |  | 4,488 |  |  |  |  |
| $ | 19,959 |  |  | $ | 21,198 |  |  |  |  |
Employee Stock Purchase Plan – The Company maintains the ESPP for all eligible employees as described in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2025. Under the ESPP, shares of the Company's common stock may be purchased on the last day of each bi-annual offering period at 85% of the fair value on the last day of such offering period. The offering periods run from March 1st through August 31st and from September 1st through the last day of February each year.

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