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Related Party Transaction - Additional Information (Detail) - USD ($) |  | 12 Months Ended | 13 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 07, 2016 | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2021 | Sep. 30, 2020 | Aug. 03, 2020 | Aug. 02, 2020
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Maximum number of preferred stock to be issued (in shares) |  | 2,000,000 | 2,000,000 | 2,000,000 |  | 2,000,000 | 1,000,000
Common stock, shares authorized (in shares) |  | 40,000,000 | 40,000,000 | 40,000,000 |  | 40,000,000 | 20,000,000
Common stock, par value (in usd per share) |  | $ 0.01 | $ 0.01 | $ 0.01 |  |  |
Net proceeds from common stock offering |  | $ 3,584,000 | $ 0 |  |  |  |
Ladenburg Thalmann & Co. Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  |  |  | 5,000,000 |  |
Common stock, par value (in usd per share) |  |  |  |  | $ 0.01 |  |
Former CEO |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest rate on obligation payable to related party |  | 4.00% |  |  |  |  |
Outstanding obligation payable to related party, current |  | $ 968,000 |  | $ 968,000 |  |  |
Series A Preferred Stock - $1.00 par value per share | Ladenburg Thalmann & Co. Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Maximum number of preferred stock to be issued (in shares) | 500,000 |  |  |  | 500,000 |  |
Percentage of compensation fees to be paid | 2.00% |  |  |  |  |  |
Stock issued during period (in shares) |  | 44,186 |  | 994,046 |  |  |
Preferred stock issued from at the market sale of stock program (as a percent) |  | 100.00% |  |  |  |  |
Gross proceeds from preferred stock |  | $ 1,000,000.0 |  |  |  |  |
Equity distribution compensation expenses |  | 20,408 |  |  |  |  |
Net proceeds from preferred stock |  | 1,000,000.0 |  |  |  |  |
Series A Preferred Stock - $1.00 par value per share | Non-Executive Chairman |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Equity distribution compensation expenses |  | $ 0 |  |  |  |  |
Common Stock | Ladenburg Thalmann & Co. Inc. |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Stock issued during period (in shares) |  | 1,584,556 |  |  |  |  |
Equity distribution compensation expenses |  | $ 79,307 |  |  |  |  |
Gross proceeds from common stock |  | 4,000,000.0 |  |  |  |  |
Net proceeds from common stock offering |  | 3,600,000 |  |  |  |  |
Common Stock | Non-Executive Chairman |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Equity distribution compensation expenses |  | $ 0 |  |  |  |  |

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