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Segment Reporting - Narratives (Details)	6 Months Ended
	Jun. 30, 2026
Segment Reporting [Abstract]
Number of reportable segments not disclosed	Reportable Segments

X

- Definition

Number Of Reportable Segments Not Disclosed Flag

+ References

No definition available.

+ Details

Name:	hapn_NumberOfReportableSegmentsNotDisclosedFlag
Namespace Prefix:	hapn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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