No definition available.

Name:	hmco_FounderSharesAbstract
Namespace Prefix:	hmco_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of trading days for common stock price to exceed threshold, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	hmco_NumberOfTradingDays
Namespace Prefix:	hmco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time required before warrants become exercisable after the completion of a Business Combination, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	hmco_PeriodRequiredForWarrantsToBecomeExercisableCompletionOfBusinessCombination
Namespace Prefix:	hmco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold period after the initial Business Combination for the common stock price to exceed the threshold price per share, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	hmco_ThresholdPeriodAfterInitialBusinessCombination
Namespace Prefix:	hmco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Threshold to redeem warrants over a specified consecutive trading period, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	hmco_WarrantsThresholdConsecutiveTradingDays
Namespace Prefix:	hmco_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares issued which are neither cancelled nor held in the treasury.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of common and preferred stock issued as dividends during the period. Excludes stock splits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockDividendsShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=hmco_FounderSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_InvestorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ChiefOperatingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_ChiefFinancialOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RELATED PARTIES, Founder Shares (Details) - USD ($)			1 Months Ended	3 Months Ended
RELATED PARTIES, Founder Shares (Details) - USD ($)	Dec. 08, 2020	Oct. 12, 2020	Nov. 30, 2020	Dec. 31, 2020
Founder Shares [Abstract]
Proceeds from issuance of Class B common stock to Sponsor				$ 25,000
Founder Shares [Member] \| Sponsor [Member]
Founder Shares [Abstract]
Period warrants to become exercisable after completion of business combination				1 year
Founder Shares [Member] \| Sponsor [Member] \| Class A Common Stock [Member]
Founder Shares [Abstract]
Number of consecutive trading days				30 days
Trading day threshold period				20 days
Founder Shares [Member] \| Sponsor [Member] \| Class A Common Stock [Member] \| Minimum [Member]
Founder Shares [Abstract]
Share price (in dollars per share)				$ 12.00
Threshold period after initial Business Combination				150 days
Founder Shares [Member] \| Sponsor [Member] \| Class B Common Stock [Member]
Founder Shares [Abstract]
Shares issued (in shares)		6,468,750
Proceeds from issuance of Class B common stock to Sponsor		$ 25,000
Stock dividend issued (in shares)	718,750
Number of shares outstanding (in shares)	7,187,500
Founder Shares [Member] \| Independent Directors [Member] \| Class B Common Stock [Member]
Founder Shares [Abstract]
Shares issued (in shares)			25,000
Founder Shares [Member] \| Chief Executive Officer [Member] \| Class B Common Stock [Member]
Founder Shares [Abstract]
Shares issued (in shares)			75,000
Founder Shares [Member] \| Chief Operating Officer [Member] \| Class B Common Stock [Member]
Founder Shares [Abstract]
Shares issued (in shares)			25,000
Founder Shares [Member] \| Financial Analyst [Member] \| Class B Common Stock [Member]
Founder Shares [Abstract]
Shares issued (in shares)			10,000