Note 2 - Summary of Significant Accounting Policies (Tables)  | 
9 Months Ended | ||||||||||||||||||||||||
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Jul. 31, 2019  | |||||||||||||||||||||||||
| Notes Tables | |||||||||||||||||||||||||
| Property, Plant and Equipment, Useful Life [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 | ||||||||||
- References No definition available. 
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