Description of Business and Nature of Operations (Details) - Real estate brokerage - USD ($)	Jun. 30, 2021	Mar. 01, 2021
Red Barn
Number of growing regional brokerage agents		230
Epic
Number of growing regional brokerage agents	350

Represents for number of growing regional brokerage agents.

No definition available.

Name:	fthm_NumberOfGrowingRegionalBrokerageAgents
Namespace Prefix:	fthm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant