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Surplus Reserve (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Surplus Reserve [Line Items]
Tax net profits percentage	10.00%
Statutory reserve percentage	50.00%
Statutory reserve amounted	$ 370,683	$ 370,683

X

- Definition

Percentage of statutory reserve.

+ References

No definition available.

+ Details

Name:	hlp_StatutoryReservePercentage
Namespace Prefix:	hlp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	hlp_SurplusReserveDetailsLineItems
Namespace Prefix:	hlp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tax net profits percentage.

+ References

No definition available.

+ Details

Name:	hlp_TaxNetProfitsPercentage
Namespace Prefix:	hlp_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of retained earnings as of the balance sheet date that cannot be distributed to stockholders pursuant to statutory rules and regulations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

+ Details

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