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Note 8 - Stockholders' Equity (Tables) | 3 Months Ended
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Jun. 30, 2024
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended June 30, |
|  | 2024 |  |  | 2023 |
Stock-based compensation expense |  | $ | 2,928 |  |  | $ | 2,968 |
Stock-based compensation expense, net of tax |  | $ | 2,928 |  |  | $ | 2,096 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Options |
|  | Shares Subject to Options |  |  | Weighted- Average Exercise Price per Share |  |  | Weighted-Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value |
Outstanding as of March 31, 2024 |  |  | 194 |  |  | $ | 181.89 |  |  |  | 3.2 |  |  | $ | 26 |
Awards granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Awards forfeited or expired |  |  | (13 | ) |  |  | 147.07 |  |  |  |  |  |  |  |  |
Awards exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Outstanding as of June 30, 2024 |  |  | 181 |  |  | $ | 184.42 |  |  |  | 3.1 |  |  | $ | - |
Share-Based Payment Arrangement, Activity [Table Text Block] |
|  | 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, 2024 |  |  | 76 |  |  | $ | 157.83 |  |  |  | 56 |  |  | $ | 240.96 |
Awards granted(1) |  |  | 101 |  |  |  | 89.82 |  |  |  | 41 |  |  |  | 102.57 |
Awards forfeited |  |  | (2 | ) |  |  | 154.69 |  |  |  | - |  |  |  | - |
Awards distributed |  |  | (21 | ) |  |  | 182.89 |  |  |  | - |  |  |  | - |
Outstanding as of June 30, 2024 |  |  | 154 |  |  | $ | 109.69 |  |  |  | 97 |  |  | $ | 181.85 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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