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Stockholders' Equity - Additional Information (Details) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 08, 2022 USD ($) | Mar. 11, 2021 USD ($) | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 shares | Dec. 31, 2018 shares
Termination date of stock repurchase program |  | Mar. 31, 2023 | Mar. 31, 2022 |  |  |  |  |  |  |  |
Common stock issued under dividend reinvestment plan | shares |  |  |  | 48,858 |  | 38,436 |  |  |  |  |
Shares outstanding at end of period | shares | [2] |  |  | 9,581,536 | [1] | 9,699,695 | [1] | 7,516,423 | [1] | 4,482,968 | 3,732,685
Reverse stock split |  |  |  | 0.10 |  |  |  |  |  |  |
Stock repurchases, value |  |  |  | $ 3,831,000 |  | $ 1,827,000 |  | $ 863,000 |  |  |
4.875% Notes Due 2026 |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  | 4.875% |  |  |  |  |  |  |
Stock Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  | $ 10,000,000 |  |  |  |  |  |  |  |
Period of stock repurchase program |  |  | 1 year |  |  |  |  |  |  |  |
Stock repurchases, shares | shares |  |  |  | 167,017 |  | 75,377 |  |  |  |  |
Stock repurchases, value |  |  |  | $ 3,800,000 |  | $ 1,800,000 |  |  |  |  |
Renewed Stock Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  | $ 10,000,000 |  |  |  |  |  |  |  |  |
Period of stock repurchase program |  | 1 year |  |  |  |  |  |  |  |  |
[1] | The Company completed a Reverse Stock Split of 10 to 1 effective August 26, 2021, the common shares outstanding and net asset value per common share values have been adjusted retroactively to reflect the split for all periods presented
[2] | Totals may not sum due to rounding.

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