Debt Instrument, Agent Fee

No definition available.

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Period Type:	duration

- Definition

Line Of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Commencement of Payment of Unused Capacity, Commitment Fee Percentage

+ References

No definition available.

+ Details

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- Definition

Aggregate commitments related to loans held for investment at carrying value.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Loans held for investment at carrying value, outstanding principal new fundings made during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Loans Held for Investment at Carrying Value, Unfunded Commitment

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number Of Loans Held for Investment

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Receivable with Imputed Interest, Discount Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Receivable with Imputed Interest, Extension Term

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Receivable with Imputed Interest, Number of Extension Terms

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Receivable with Imputed Interest, Percentage Of Ownership

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Receivable with Imputed Interest, Purchase Price

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Receivable with Imputed Interest, Term

+ References

No definition available.

+ Details

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Namespace Prefix:	suns_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482949/835-30-55-8

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482900/835-30-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The principal amount of the receivable or note before consideration of the discount or premium.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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- Details

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- Details

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- Details

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SUBSEQUENT EVENTS (Details)			1 Months Ended	9 Months Ended
SUBSEQUENT EVENTS (Details)	Nov. 07, 2024 USD ($)	Nov. 06, 2024 USD ($)	Jan. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Nov. 01, 2024 USD ($) extension loan	Dec. 31, 2023 USD ($)
Subsequent Event [Line Items]
Loans held at carrying value, outstanding principal				$ 97,547,112		$ 0
Loans held for investments aggregate commitments				121,600,000		$ 0
Loans held at carrying value, outstanding principal fundings				$ 122,500,000
Secure Mezzanine Loan, Maturing January 2025
Subsequent Event [Line Items]
Loans held for investments aggregate commitments			$ 28,200,000
Percentage of ownership			50.00%
Secure Mezzanine Loan, Maturing May 2027
Subsequent Event [Line Items]
Loans held for investments aggregate commitments			$ 20,700,000
Interest rate			13.00%
Discount rate			1.00%
Percentage of ownership			50.00%
Purchase price			$ 20,400,000
Unfunded commitment			7,500,000
Affiliated Entity \| Secure Mezzanine Loan, Maturing January 2025
Subsequent Event [Line Items]
Loans held at carrying value, outstanding principal			56,400,000
Loans held for investments aggregate commitments			28,200,000
Affiliated Entity \| Secure Mezzanine Loan, Maturing May 2027
Subsequent Event [Line Items]
Loans held at carrying value, outstanding principal			56,400,000
Loans held for investments aggregate commitments			20,700,000
Unfunded commitment			$ 15,000,000
Secured Overnight Financing Rate (SOFR) \| Secure Mezzanine Loan, Maturing January 2025
Subsequent Event [Line Items]
Interest rate			15.31%
Base Rate \| Secure Mezzanine Loan, Maturing January 2025
Subsequent Event [Line Items]
Interest rate			2.42%
Subsequent Event \| Condominium \| FLORIDA
Subsequent Event [Line Items]
Loans held for investments aggregate commitments					$ 30,000,000
Loans held at carrying value, outstanding principal fundings	$ 3,600,000
Subsequent Event \| Condominium \| FLORIDA \| Whole Loan
Subsequent Event [Line Items]
Discount rate	1.00%
Receivable with imputed interest, term	26 months
Number of extension terms \| extension					2
Extension term	6 months
Subsequent Event \| Condominium \| FLORIDA \| A-Notes
Subsequent Event [Line Items]
Loans held for investments aggregate commitments					$ 62,400,000
Number of loans held for investment \| loan					2
Subsequent Event \| Condominium \| FLORIDA \| B-Notes
Subsequent Event [Line Items]
Loans held for investments aggregate commitments					$ 33,600,000
Number of loans held for investment \| loan					2
Subsequent Event \| Condominium \| FLORIDA \| Affiliated Entity
Subsequent Event [Line Items]
Loans held at carrying value, outstanding principal					$ 96,000,000
Loans held for investments aggregate commitments					60,000,000
Loans held at carrying value, outstanding principal fundings	$ 7,200,000
Subsequent Event \| Condominium \| FLORIDA \| Nonrelated Party
Subsequent Event [Line Items]
Loans held for investments aggregate commitments					6,000,000.0
Loans held at carrying value, outstanding principal fundings	$ 700,000
Subsequent Event \| Condominium \| FLORIDA \| Nonrelated Party \| B-Notes
Subsequent Event [Line Items]
Loans held for investments aggregate commitments					$ 6,000,000
Subsequent Event \| Secured Overnight Financing Rate (SOFR) \| Condominium \| FLORIDA \| A-Notes
Subsequent Event [Line Items]
Interest rate	4.75%
Subsequent Event \| Secured Overnight Financing Rate (SOFR) \| Condominium \| FLORIDA \| B-Notes
Subsequent Event [Line Items]
Interest rate	11.00%
Subsequent Event \| Base Rate \| Condominium \| FLORIDA \| A-Notes
Subsequent Event [Line Items]
Interest rate	4.75%
Subsequent Event \| Base Rate \| Condominium \| FLORIDA \| B-Notes
Subsequent Event [Line Items]
Interest rate	4.75%
Subsequent Event \| Revolving Credit Facility \| Line of Credit
Subsequent Event [Line Items]
Revolving credit loan commitment		$ 50,000,000
Increase limit		$ 200,000,000
Increase in interest rate		0.25%
Agent fee		$ 75,000
Loan fee payable		0.25%
Commencement of unused capacity, commitment fee percentage payable		6 months
Unused line fee percentage		0.25%
Subsequent Event \| Revolving Credit Facility \| Line of Credit \| Secured Overnight Financing Rate (SOFR)
Subsequent Event [Line Items]
Basis spread on variable interest rate		2.75%
Subsequent Event \| Revolving Credit Facility \| Line of Credit \| Base Rate
Subsequent Event [Line Items]
Basis spread on variable interest rate		2.63%