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Note 15 - Shareholders' Equity (Details Textual)
Nov. 02, 2021
shares
Oct. 28, 2011
$ / shares
shares
Oct. 31, 2024
shares
Common Stock Dividends, Rights Per Share (in shares) | shares 1 1  
Minimum Percentage of Stock Owner in Stockholder Protection Rights Agreement   15.00%  
Preferred Stock, Exercise Price (in dollars per share) | $ / shares   $ 25  
Preferred Stock, Number of Votes   1,000  
Preferred Stock, Dividend Rate, Common Stock Dividend Amount Multiplier   1,000  
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares   $ 0.0001  
Preferred Stock, Capital Shares Reserved for Future Issuance (in shares) | shares     100,000