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Note 11 - Equity and Stock-Based Compensation (Details Textual)
3 Months Ended 12 Months Ended
Sep. 04, 2024
USD ($)
shares
Apr. 30, 2025
USD ($)
Apr. 30, 2024
USD ($)
Jan. 31, 2025
Aug. 29, 2024
$ / shares
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares         $ 1
Preferred Stock, Convertible, Conversion Ratio         3.9
Treasury Stock Reissued at Lower than Repurchase Price, Conversion of Convertible Securities $ 14,800,000        
Share-Based Payment Arrangement, Expense   $ 272,000 $ 48,000    
Conversion of Series A Preferred Stock Into Common Stock [Member]          
Conversion of Stock, Shares Issued (in shares) | shares 6,600,000        
Series A Preferred Stock [Member]          
Preferred Stock, Dividend Rate, Percentage       9.00%