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Inventories (Details)	12 Months Ended
Inventories (Details)	Mar. 31, 2020 USD ($)
Inventory Disclosure [Abstract]
Inventory write-downs	$ 117,753

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Namespace Prefix:	happ_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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