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Note 3 - Earnings Per Share (Tables) | 12 Months Ended
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Mar. 31, 2026
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Fiscal Year: |
|  | 2026 |  |  | 2025 |  |  | 2024 |
Basic |  |  |  |  |  |  |  |  |  |  |  |
Net earnings |  | $ | 114,674 |  |  | $ | 41,224 |  |  | $ | 63,318 |
Deduct preferred stock dividends |  |  | 23 |  |  |  | 23 |  |  |  | 23 |
Undistributed net earnings |  |  | 114,651 |  |  |  | 41,201 |  |  |  | 63,295 |
Earnings attributable to participating preferred shareholders |  |  | 116 |  |  |  | 48 |  |  |  | 72 |
Earnings attributable to common shareholders |  | $ | 114,535 |  |  | $ | 41,153 |  |  | $ | 63,223 |
Weighted average common shares outstanding |  |  | 6,837 |  |  |  | 6,912 |  |  |  | 7,318 |
Basic earnings per common share |  | $ | 16.75 |  |  | $ | 5.95 |  |  | $ | 8.64 |
Diluted |  |  |  |  |  |  |  |  |  |  |  |
Earnings attributable to common shareholders |  | $ | 114,535 |  |  | $ | 41,153 |  |  | $ | 63,223 |
Add dividends on convertible preferred stock |  |  | 20 |  |  |  | 20 |  |  |  | 20 |
Earnings attributable to common stock on a diluted basis |  | $ | 114,555 |  |  | $ | 41,173 |  |  | $ | 63,243 |
Weighted average common shares outstanding - basic |  |  | 6,837 |  |  |  | 6,912 |  |  |  | 7,318 |
Additional shares to be issued under full conversion of preferred stock |  |  | 67 |  |  |  | 67 |  |  |  | 67 |
Total shares for diluted |  |  | 6,904 |  |  |  | 6,979 |  |  |  | 7,385 |
Diluted earnings per common share |  | $ | 16.59 |  |  | $ | 5.90 |  |  | $ | 8.56 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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