XML 53 R42.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Note 6 - Fair Value - Reconciliation of Level 3 Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Balance	$ 706,858	$ 716,319
Purchase of investments	23,319	47,008
Warrants received and classified as Level 3	128	141
Principal payments received on investments	(19,643)	(39,756)
Payment-in-kind interest on investments	1,382	1,204
Proceeds from sale of investments	(41)	(6,520)
Net realized gain (loss) on investments	21	(134)
Unrealized (depreciation) appreciation included in earnings	(2,903)	(5,867)
Transfer out of debt investments	0	0
Other	825	1,012
Balance	709,946	713,407
Debt [Member]
Balance	670,172	686,458
Purchase of investments	22,177	46,998
Warrants received and classified as Level 3	0	0
Principal payments received on investments	(19,080)	(39,756)
Payment-in-kind interest on investments	1,382	1,204
Proceeds from sale of investments	(41)	(6,508)
Net realized gain (loss) on investments	38	7
Unrealized (depreciation) appreciation included in earnings	(1,509)	(4,566)
Transfer out of debt investments	(3,191)	(295)
Other	825	1,012
Balance	670,773	684,554
Warrant [Member]
Balance	22,975	26,145
Purchase of investments	0	0
Warrants received and classified as Level 3	128	141
Principal payments received on investments	0	0
Payment-in-kind interest on investments	0	0
Proceeds from sale of investments	0	(12)
Net realized gain (loss) on investments	(17)	(141)
Unrealized (depreciation) appreciation included in earnings	70	(1,490)
Transfer out of debt investments	0	(5)
Other	0	0
Balance	23,156	24,638
Equity Securities [Member]
Balance	7,281	2,416
Purchase of investments	750	10
Warrants received and classified as Level 3	0	0
Principal payments received on investments	0	0
Payment-in-kind interest on investments	0	0
Proceeds from sale of investments	0	0
Net realized gain (loss) on investments	0	0
Unrealized (depreciation) appreciation included in earnings	(1,206)	189
Transfer out of debt investments	0	300
Other	0	0
Balance	6,825	2,915
Other Investments [Member]
Balance	6,430	1,300
Purchase of investments	392	0
Warrants received and classified as Level 3	0	0
Principal payments received on investments	(563)	0
Payment-in-kind interest on investments	0	0
Proceeds from sale of investments	0	0
Net realized gain (loss) on investments	0	0
Unrealized (depreciation) appreciation included in earnings	(258)	0
Transfer out of debt investments	3,191	0
Other	0	0
Balance	$ 9,192	$ 1,300

X

- Definition

Amount of unrealized appreciation (depreciation) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

No definition available.

+ Details

Name:	hrzn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAppreciationDepreciationIncludedInEarnings
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of other increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

+ Details

Name:	hrzn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetOtherPeriodIncreaseDecrease
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of payment in-king interest on financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

+ Details

Name:	hrzn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPaymentInkindInterest
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of realized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

No definition available.

+ Details

Name:	hrzn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRealizedGainLossIncludedInEarnings
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of transfer of financial instrument classified as an asset between investments.

+ References

No definition available.

+ Details

Name:	hrzn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersBetweenInvestments
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of received warrants and equity received of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

No definition available.

+ Details

Name:	hrzn_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetWarrantsAndEquityReceived
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 101
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-101

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 101
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-101

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

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

X

- Definition

Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 101
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-101

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

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

X

- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 101
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-101

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_DebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_OtherInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: