XML 76 R60.htm IDEA: XBRL DOCUMENT v3.26.1

Note 13 - MRCC Merger (Details Textual) - MRCC Merger [Member] $ in Millions	Apr. 14, 2026 USD ($) shares
Cash Acquired from Acquisition	$ 141.3
Asset Acquisition, Number of Shares Issued (in shares) | shares	20,370,645
Asset Acquistion, Number of Shares Issued For Each Share of Acquiree's Common Stock (in shares) | shares	0.9402
Asset Acquisition, Percentage Owned After Merger by Former Stockholders of Acquiree	29.86%
Asset Acquisition, Percentage Owned After Merger by Legacy Stockholders	70.14%
Asset Acquisition, Consideration Transferred, Transaction Cost	$ 4.4
Base Management and Incentive Fees Waived	4.0
Base Management and Incentive Fees, Amount Waived per Quarter	$ 1.0

X

- Definition

Represents the number of shares transferred in an asset acquisition.

+ References

No definition available.

+ Details

Name:	hrzn_AssetAcquisitionNumberOfSharesIssued
Namespace Prefix:	hrzn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the number of shares issued for each share of the acquiree's common stock in relation to an asset acquisition.

+ References

No definition available.

+ Details

Name:	hrzn_AssetAcquisitionNumberOfSharesIssuedForEachShareOfAcquireesCommonStock
Namespace Prefix:	hrzn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the percentage owned after a merger or asset acquisition by the former stockholders of the acquiree.

+ References

No definition available.

+ Details

Name:	hrzn_AssetAcquisitionPercentageOwnedAfterMergerByFormerStockholdersOfAcquiree
Namespace Prefix:	hrzn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the percentage owned after a merger or asset acquisition by the legacy stockholders.

+ References

No definition available.

+ Details

Name:	hrzn_AssetAcquisitionPercentageOwnedAfterMergerByLegacyStockholders
Namespace Prefix:	hrzn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of base management and incentive fees waived per quarter.

+ References

No definition available.

+ Details

Name:	hrzn_BaseManagementAndIncentiveFeesAmountWaivedPerQuarter
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of base management and incentive fees that were waived.

+ References

No definition available.

+ Details

Name:	hrzn_BaseManagementAndIncentiveFeesWaived
Namespace Prefix:	hrzn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of transaction cost incurred as part of consideration transferred in asset acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479908/805-50-55-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

+ Details

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

X

- Definition

The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

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

X

- Details

Name:	us-gaap_AssetAcquisitionAxis=hrzn_MRCCMergerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: