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Related Party Transactions - Summary of Related Party Carrying Value of Investments In Advances (Detail) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Related Party Transaction [Line Items] |  |  |
Total investments in and advances |  | $ 78,222,349 | $ 62,371,167
SSGT III OP |  |  |
Related Party Transaction [Line Items] |  |  |
Receivables |  | 299,156 | 156,081
Total investments in and advances |  | 4,701,500 | 22,320,768
SSGT III OP | SSGT III Mezzanine Loan |  |  |
Related Party Transaction [Line Items] |  |  |
Debt | [1] |  | 17,500,000
SSGT III OP | SSGT III OP Units and SSGT III SLP |  |  |
Related Party Transaction [Line Items] |  |  |
Equity |  | 4,402,344 | 4,664,687
SST VI |  |  |
Related Party Transaction [Line Items] |  |  |
Receivables |  | 5,736,245 | 1,828,989
Total investments in and advances |  | 73,520,849 | 40,050,399
SST VI | SST VI Mezzanine Loan |  |  |
Related Party Transaction [Line Items] |  |  |
Debt | [2] | 50,000,000 | 35,000,000
SST VI | SST VI OP Units and SST VI SLP |  |  |
Related Party Transaction [Line Items] |  |  |
Equity |  | 2,784,604 | $ 3,221,410
SST VI | Preferred Units in SST VI OP |  |  |
Related Party Transaction [Line Items] |  |  |
Equity | [3] | $ 15,000,000 |
[1] | (1) As of March 31, 2023 and December 31, 2022, $17.5 million was available to be drawn on the SSGT III Mezzanine Loan.
[2] | As of March 31, 2023 and December 31, 2022, $5.0 million and $20.0 million, respectively, was available to be drawn on the SST VI Mezzanine Loan. On May 2, 2023, SST VI fully repaid the outstanding principal, plus all applicable accrued interest due on the SST VI Mezzanine Loan as of such date for a total amount of approximately $51.7 million.
[3] | On May 2, 2023, SST VI fully redeemed SmartStop's preferred investment of 600,000 Series A Cumulative Redeemable Preferred units of limited partnership interest in SST VI OP, and repaid accrued distributions due as of the date of redemption for a total amount of approximately $15.1 million.

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- Definition Amount of Equity in net profit and loss for the period. Give totals for each group. If operations of any controlled companies are different in character from those of the company, group such affiliates (1) within divisions and (2) by type of activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(Column C)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(2)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14(6)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 + Details
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