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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

X

- 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

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
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-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 15
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