Summary of Significant Accounting Policies - Concentration of credit risk (Details)	6 Months Ended
Jun. 30, 2021 USD ($)
Summary of Significant Accounting Policies
Federal Depository Insurance Corporation coverage	$ 250,000
Maturity term of U.S. government securities	185 days

The maximum maturity term of investments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	hzac_InvestmentsMaximumMaturityTerm
Namespace Prefix:	hzac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration