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Income Taxes - Schedule of Deferred Assets and Liabilities (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Schedule of Deferred Assets and Liabilities [Abstract]
Depreciation and amortization	$ 28,948	$ 2,357
Allowance for CECL	6,971	7,916
Inventory reserve	4,854
Deferred tax assets	$ 40,773	$ 10,273

X

- Definition

Represent the amount of allowance for CECL.

+ References

No definition available.

+ Details

Name:	hlp_AllowanceForCECL
Namespace Prefix:	hlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of deferred tax assets, depreciation, and amortization.

+ References

No definition available.

+ Details

Name:	hlp_DeferredTaxAssetsDepreciationAndAmortization
Namespace Prefix:	hlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

+ Details

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

X

- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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

X

- References

No definition available.

+ Details

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