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Note 7 - Stockholders' Equity and Stock Incentive Plans (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Sep. 30, 2025 | Dec. 31, 2024 | Jul. 17, 2025 | Dec. 05, 2024 | May 09, 2024 | May 04, 2023 | Jun. 01, 2022 | Oct. 21, 2021
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  |  | $ 12,200 |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 1 year 3 months 18 days |  |  |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  | 3 years |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) | 147,970 | 241,277 |  |  |  |  |  |  |  |
Shares Issued Per Unit (in shares) | 1.22 | 1.94 |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) | 55,433 | 94,862 |  |  |  |  |  |  |  |
Share Based Payment Arrangement, Shares Issued In Period, Net of Tax Withholdings (in shares) | 92,537 | 146,415 |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 0 | $ 800 |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  |  | $ 3,000 |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 1 year 10 months 24 days |  |  |  |  |  |  |
Career Shares [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  |  | $ 1,600 |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 3 years 2 months 12 days |  |  |  |  |  |  |
The 2021 Program [Member] |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 500,000 | $ 500,000 | $ 500,000 | $ 500,000 | $ 500,000 | $ 300,000
Share Repurchase Program, Remaining Authorized, Amount |  |  | $ 547,400 |  |  |  |  |  |  |
The 2020 Plan [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  | 3 years | 3 years |  |  |  |  |  |
The 2020 Plan [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage |  |  | 0.33% |  |  |  |  |  |  |
The 2020 Plan [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage |  |  | 0.33% |  |  |  |  |  |  |
The 2020 Plan [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche Three [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage |  |  | 0.33% |  |  |  |  |  |  |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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