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Related Party Transactions - Summary of Related Party Carrying Value of Investments In Advances (Parenthetical) (Detail) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 30, 2023 | Jan. 26, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Oct. 07, 2021
Related Party Transaction [Line Items] |  |  |  |  |  |
Investment operating partnership |  |  | $ 62,371,167 | $ 12,404,380 |  |
Principal borrowing amount |  |  |  |  |  | $ 700,000,000
Outstanding principal, plus accrued interest |  |  | 86,237,235 | 422,190,754 | $ 0 |
SST VI |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Investment operating partnership |  |  | 40,050,400 | 11,802,138 |  |
SST VI | Subsequent Event |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Additional amount borrowed | $ 15,000,000.0 |  |  |  |  |
SST VI OP | Subsequent Event |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Investment operating partnership | $ 15,000,000.0 |  |  |  |  |
SSGT III | Subsequent Event |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Outstanding principal, plus accrued interest |  | $ 17,500,000 |  |  |  |
SST VI Mezzanine Loan |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Principal borrowing amount |  |  | $ 20,000,000.0 | $ 38,200,000 |  |
SSGT III Mezzanine Loan | Subsequent Event |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Principal borrowing amount |  | $ 17,500,000 |  |  |  |

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- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(18)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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