Note 2 - Summary of Significant Accounting Policies (Tables)  | 
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Oct. 31, 2023  | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Notes Tables | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment, Useful Life [Table Text Block] | 
    
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| Disaggregation of Revenue [Table Text Block] | 
    
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| X | ||||||||||
- Definition Tabular disclosure for useful life of property, plant and equipment. No definition available. 
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| X | ||||||||||
- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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| X | ||||||||||
- References No definition available. 
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