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Fair value measurements - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2022	Sep. 30, 2021	Dec. 31, 2021
Gain recognized on change in fair value of warrants liabilities	$ 619,543	$ 2,351,375
Proceeds received in excess of initial fair value of convertible promissory note related party	$ 136,827
Public Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.55		$ 0.72

X

- Definition

Gain loss on change in fair value of warrant liabilities.

+ References

No definition available.

+ Details

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Namespace Prefix:	hyac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Proceeds received in excess of initial fair value of convertible promissory note – related party.

+ References

No definition available.

+ Details

Name:	hyac_ProceedsReceivedInExcessOfInitialFairValueOfConvertiblePromissoryNoteRelatedParty
Namespace Prefix:	hyac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=hyac_PublicWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: