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Note 12 - Related Party Transaction (Details Textual) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 12, 2021 | Sep. 30, 2020 | Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2022 | Oct. 31, 2021 | Jan. 31, 2022
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  | $ 1.00 |  | $ 1.00 |  | $ 1.00
Common Stock, Par or Stated Value Per Share (in dollars per share) |  |  | $ 0.01 |  | $ 0.01 |  | $ 0.01
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  |  | $ 0 | $ 5,145,000 |
Proceeds from Issuance of Common Stock |  |  |  |  | $ 0 | $ 43,000 |
Common Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  | 0 |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  | 27 |  |  |
Underwriting Agreement [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Preferred Stock and Preference Stock | $ 9,500,000 |  |  |  |  |  |
Payments of Stock Issuance Costs | $ 576,000 |  |  |  |  |  |
Underwriting Agreement [Member] | Preferred Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 432,000 |  |  |  |  |  |
Ladenburg Thalmann and Co. Inc. [Member] | First ATM Offering Program [Member] | Common Stock [Member] |  |  |  |  |  |  |
Equity Offering, Maximum Shares to be Issued (in shares) |  | 5,000,000 |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 0.01 |  |  |  |  |
Ladenburg Thalmann and Co. Inc. [Member] | Second ATM Offering Program [Member] | Common Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  | 0 |  | 0 | 18,415 |
Payments of Stock Issuance Costs |  |  |  |  |  | $ 1,000 |
Proceeds from Issuance of Common Stock |  |  |  |  |  | $ 43,000 |
Ladenburg Thalmann and Co. Inc. [Member] | Series A Preferred Stock [Member] | First ATM Offering Program [Member] |  |  |  |  |  |  |
Equity Offering, Maximum Shares to be Issued (in shares) |  | 500,000 |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 9.00% |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  | $ 1.00 |  |  |  |  |
Equity Offering, Distribution Compensation, Percentage of Gross Proceeds |  | 2.00% |  |  |  |  |
Ladenburg Thalmann and Co. Inc. [Member] | Series A Preferred Stock [Member] | Second ATM Offering Program [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  | 0 | 26,506 | 0 | 211,246 |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  | $ 642,000 |  | $ 5.1 |
Payments of Stock Issuance Costs |  |  |  | $ 13,000 |  | $ 105,000 |

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