Summary of Significant Accounting Policies - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
New billings	$ 1,566	$ (228)	$ (4,705)
Annual dues
Disaggregation of Revenue [Line Items]
Deferred revenue recognition period	12 months
Balance at beginning of period	$ 15,877
New billings	35,514
Revenue recognized	(35,409)
Balance at the end of period	15,982	15,877
Revenue recognized	14,400
Franchise sales
Disaggregation of Revenue [Line Items]
Balance at beginning of period	27,560
New billings	7,750
Revenue recognized	(9,426)
Balance at the end of period	25,884	$ 27,560
Revenue recognized	$ 8,400
Franchise sales | RE/MAX franchise agreements
Disaggregation of Revenue [Line Items]
Period of franchise agreement	5 years
Franchise sales | Motto Franchising
Disaggregation of Revenue [Line Items]
Period of franchise agreement	7 years