Material accounting policies, Intangible Assets (Details)	12 Months Ended
Dec. 31, 2024
Material accounting policies [Abstract]
Intangible assets useful life	5 years

The useful life, measured as period of time, used for intangible asset.

No definition available.

Name:	hafn_IntangibleAssetsUsefulLife
Namespace Prefix:	hafn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration