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Note 1 - Basis of Presentation (Details Textual) | Mar. 29, 2019 $ / shares | Mar. 19, 2019 | Oct. 31, 2020 $ / shares | Oct. 31, 2019 $ / shares
--- | --- | --- | --- | ---
Common Class A [Member] |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 |  | $ 0.01 | $ 0.01
Common Class B [Member] |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ 0.01 |  | $ 0.01 | $ 0.01
Reverse Stock Split [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 25 | 25 |  |
Reverse Stock Split [Member] | Common Class A [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 25 |  |  |
Reverse Stock Split [Member] | Common Class B [Member] |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 25 |  |  |
Consolidated Joint Venture [Member] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  | 99.00% |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  | 1.00% |

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