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Note 15 - Common Stock Purchase Agreement (Details Textual) - USD ($) |  |  |  |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 23, 2022 | Aug. 23, 2022 | Aug. 15, 2022 | Aug. 03, 2022 | Jul. 25, 2022 | Mar. 29, 2022 | May 31, 2023 | May 31, 2022 | Nov. 30, 2022
Common Stock, Par or Stated Value Per Share |  |  |  |  |  | $ 0.01 | $ 0.01 |  | $ 0.01
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  | $ 117,200 |
Alumni Capital [Member] |  |  |  |  |  |  |  |  |
Common Stock Purchase Agreement, Maximum Gross Proceeds from Issuance or Sale of Equity |  |  |  |  |  | $ 3,000,000 |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 65,000 | 65,000 | 50,000 | 50,000 | 50,000 | 20,000 | 280,000 | 20,000 |
Common Stock Purchase Agreement, Shares to be Issued |  |  |  |  |  | 20,000 |  |  |
Equity Issuance Cost, Total |  |  |  |  |  |  |  | $ 134,000 |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  | $ 117,000 |

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