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Stockholders' Equity (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Oct. 31, 2023
USD ($)
vote
$ / shares
shares
Aug. 31, 2023
shares
Apr. 30, 2023
$ / shares
shares
Equity [Abstract]      
Common stock, shares authorized (in shares) 5,000,000   5,000,000
Common stock, par value (in dollars per share) | $ / shares $ 2.50   $ 2.50
Votes per share | vote 1    
Common stock, shares issued (in shares) 2,907,000   2,833,000
Common stock, shares outstanding (in shares) 2,902,000   2,830,000
Number of shares authorized to be repurchased (in shares)   100,000  
Purchase of treasury stock (in shares) 2,423    
Purchase of treasury stock | $ $ 44    
Remaining number of shares authorized to be repurchased (in shares) 97,577