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Note 7 - Stockholders' Equity | 3 Months Ended
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Jun. 30, 2025
Notes to Financial Statements |
Share-Based Payment Arrangement [Text Block] | Note 7. Stockholders' Equity Stock-Based Compensation During the three months ended June 30, 2025, we issued time-based restricted stock units ("RSUs") and performance-based restricted stock units ("PSUs") pursuant to the Mesa Laboratories, Inc. Amended and Restated 2021 Equity Incentive Plan, which authorizes the issuance of 660 shares of common stock to eligible participants. Stock-based compensation expense is included in cost of revenues, selling, general and administrative, and research and development expense in the accompanying unaudited Condensed Consolidated Statements of Income. The following is a summary of RSU and PSU award activity for the three months ended June 30, 2025:
|  | Time-Based Restricted Stock Units |  |  | Performance-Based Restricted Stock Units |
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value per Share |  |  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value per Share |
Outstanding as of March 31, 2025 |  |  | 145 |  |  | $ | 106.54 |  |  |  | 85 |  |  | $ | 166.31 |
Awards granted(1) |  |  | 90 |  |  |  | 95.31 |  |  |  | 44 |  |  |  | 99.56 |
Awards forfeited |  |  | (2 | ) |  |  | 104.02 |  |  |  | - |  |  |  | - |
Awards distributed |  |  | (53 | ) |  |  | 114.67 |  |  |  | (4 | ) |  |  | 174.73 |
Outstanding as of June 30, 2025 |  |  | 180 |  |  | $ | 98.57 |  |  |  | 125 |  |  | $ | 142.39 |
(1) | Balances for PSUs granted are reflected at target.
Outstanding time-based RSUs vest and settle in shares of our common stock on a one-for-one basis. RSUs granted to employees during the three months ended June 30, 2025 vest in equal installments on June 15, 2026, June 13, 2027 and June 13, 2028. We generally recognize the expense relating to RSUs, net of estimated forfeitures, on a straight-line basis over the vesting period, or for time-based RSUs granted to participants who qualify as retirement-eligible under our plan, over a shortened service period. We grant PSUs to certain key employees. The number of shares earned is determined at the end of each performance period based on our achievement of certain pre-defined targets in accordance with the related award agreement. Outstanding PSUs vest upon completion of service periods described in the award agreements. We recognize expense for PSUs based on the probable outcome of achieving performance targets on a straight-line basis over the service period. During the three months ended June 30, 2025, the Compensation Committee of the Board of Directors approved a grant of 44 PSUs at target (“the FY26 PSUs”) to eligible employees. The FY26 PSUs have a grant date fair value of $99.56 per unit and are subject to both service and market-based performance conditions. The service period and market performance measurement period is from June 15, 2025 through June 15, 2028. The number of shares that will be earned based on market performance will range from 0% to 200% of the target number of shares. If the defined minimum targets are not met, no shares will vest. As of June 30, 2025, there were 134 shares subject to options outstanding, with a weighted average exercise price per share of $190.87 and a remaining contractual life of 2.8 years. Our Compensation Committee has not granted options to any plan participants in the past two fiscal years.

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