COMMITMENTS AND CONTINGENCIES, Underwriting Agreement (Details) - USD ($)	Dec. 31, 2020	Dec. 11, 2020
Underwriting Agreement [Abstract]
Underwriters deferred fee (in dollars per unit)	$ 0.35
Deferred underwriting fees	$ 10,062,500	$ 10,062,500

Amount of costs incurred and deferred for underwriting fees in connection with the offering of Units in Initial Public Offering and Private Placement of Warrants.

No definition available.

Name:	hmco_UnderwritingFeesDeferred
Namespace Prefix:	hmco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant