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Related Party Transactions - Summary of Related Party Carrying Value of Investments In Advances (Detail) - USD ($) | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Related Party Transaction [Line Items] |  |  |
Total investments in and advances |  | $ 35,666,042 | $ 62,371,167
SSGT III OP |  |  |
Related Party Transaction [Line Items] |  |  |
Receivables |  | 1,116,280 | 156,081
Total investments in and advances |  | 13,264,306 | 22,320,768
SSGT III OP | SSGT III Mezzanine Loan |  |  |
Related Party Transaction [Line Items] |  |  |
Debt | [1] | 8,000,000 | 17,500,000
SSGT III OP | SSGT III OP Units and SSGT III SLP |  |  |
Related Party Transaction [Line Items] |  |  |
Equity |  | 4,148,026 | 4,664,687
SST VI |  |  |
Related Party Transaction [Line Items] |  |  |
Receivables |  | 4,823,336 | 1,828,990
Total investments in and advances |  | 22,401,736 | 40,050,400
SST VI | SST VI Mezzanine Loan |  |  |
Related Party Transaction [Line Items] |  |  |
Debt | [2] | 0 | 35,000,000
SST VI | SST VI Note |  |  |
Related Party Transaction [Line Items] |  |  |
Debt |  | 15,000,000 | 0
SST VI | SST VI OP Units and SST VI SLP |  |  |
Related Party Transaction [Line Items] |  |  |
Equity |  | $ 2,578,400 | $ 3,221,410
[1] | As of June 30, 2023 and December 31, 2022, $9.5 million and $17.5 million was available to be drawn on the SSGT III Mezzanine Loan. On July 6, 2023, SSGT III paid down $3.0 million on the SSGT III Mezzanine Loan.
[2] | As of May 2, 2023, the SST VI Mezzanine Loan was terminated.

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