v3.26.1
Note 8 - Investments in Equity Securities (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended
Aug. 01, 2025
Apr. 30, 2026
Jul. 31, 2025
Equity Securities, FV-NI   $ 65,882 $ 28,470
Equity Securities, FV-NI, Unrealized Loss   7,690  
Anfield Energy, Inc. [Member]      
Consolidation of Stock, Shares Issued (in shares) 1    
Consolidation of Stock, Shares Consolidated (in shares) 75    
Anfield Common Shares and Subscription Receipts [Member]      
Equity Securities, FV-NI   29,380 26,140
Anfield Warrant [Member]      
Equity Securities, FV-NI   $ 1,410 $ 1,390
Anfield Energy, Inc. [Member]      
Investment Owned, Balance, Shares (in shares)   5,875,738 4,978,876
Ownership of Common Stock, Non-diluted Basis   32.22% 31.80%
Ownership of Common Stock, Partially Diluted Basis   36.68% 37.00%
Anfield Energy, Inc. [Member] | Anfield Warrant [Member]      
Investment Owned, Warrants Exercised, Assumed (in shares)   1,283,639