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Common Stock - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Nov. 10, 2022
Class of Stock [Line Items] |  |  |  |  |
Maximum common stock can be purchased under repurchase program | $ 5,000,000 | $ 5,000,000 |  |  |
Number of shares repurchased under repurchase program |  |  |  | 25,719 |
Number of shares repurchased under repurchase program, value |  | $ 0 | $ 0 | $ 268,000 |
Increase in NAV per share |  |  |  | $ 0.01 |
Common Stock, Shares, Outstanding | 24,727,788 | 24,727,788 | 24,437,400 |  |
Common Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Shares issued during the period |  | 290,388 | 0 | 0 |
Maximum aggregate offering price of common stock under at-the-market program |  |  |  |  | $ 50,000,000
Maximum common stock can be purchased under repurchase program | $ 5,000,000 | $ 5,000,000 |  |  |
Number of shares repurchased under repurchase program |  | 0 | 0 | 25,719 |
Number of shares repurchased under repurchase program, value |  |  |  | $ 268,000 |
Available under ATM program |  | $ 44,100,000 |  |  |
Common Stock | Raymond James & Associates, Inc. and B. Riley Securities, Inc. |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Shares issued during the period | 290,388 | 290,388 |  |  |

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