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Investment Income (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Investment Income [Abstract]
PIK fees		$ 131,000
Fee income

X

- Definition

The amount of PIK fees.

+ References

No definition available.

+ Details

Name:	oxsq_PIKFees
Namespace Prefix:	oxsq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of fee income including, but not limited to, managerial assistance, servicing of investment, and origination and commitment fees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(1)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_FeeIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentIncomeNetAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration