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Note 15 - Related Party Transaction (Details Textual) - USD ($) |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Nov. 12, 2021 | Jan. 31, 2021 | Dec. 18, 2019 | Jan. 31, 2020 | Jan. 31, 2022 | Jan. 31, 2021 | Sep. 30, 2020
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 |  |  |  |  | $ 14,676,000 | $ 1,000,000 |
Proceeds from Issuance of Common Stock |  |  |  |  | $ 43,000 | 3,584,000 |
Payable To Beneficiary Of Estate Of Former CEO [Member] |  |  |  |  |  |  |
Related Party Transaction, Rate |  | 4.00% |  |  |  |  |
Accounts Payable, Related Parties, Current |  | $ 968,000 |  |  |  | $ 968,000 |
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] | Second ATM Offering Program [Member] | Common Stock [Member] |  |  |  |  |  |  |
Equity Offering, Maximum Shares to be Issued (in shares) |  |  |  |  |  |  | 5,000,000
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  | 18,415 |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) |  |  |  |  |  |  | $ 0.01
Payments of Stock Issuance Costs |  |  |  |  | $ 1,000 |  |
Proceeds From Issuance Of Common Stock, Gross |  |  |  |  | 44,000 |  |
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 |  |  |  |
Equity Offering, Distribution Compensation, Percentage of Gross Proceeds |  |  | 2.00% |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  | 994,046 |  |  |
Equity Offering, Distribution Compensation, Percentage of Preferred Stock Issued |  |  |  | 100.00% |  |  |
Ladenburg Thalmann and Co. Inc. [Member] | Series A Preferred Stock [Member] | Second ATM Offering Program [Member] |  |  |  |  |  |  |
Equity Offering, Maximum Shares to be Issued (in shares) |  |  |  |  |  |  | 500,000
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  | 212,753 |  |
Proceeds from Issuance of Preferred Stock and Preference Stock |  |  |  |  | $ 5,300,000 |  |
Payments of Stock Issuance Costs |  |  |  |  | 106,000 |  |
Proceeds From Issuance Of Preferred Stock And Preference Stock, Net |  |  |  |  | $ 5,200,000 |  |

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