Summary of Significant Accounting Policies - Services Provided to Marketing Funds by RE/MAX Franchising (Details) - Marketing funds - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cost charges	$ 4,821	$ 3,752	$ 9,664	$ 6,677
Technology development - operating
Cost charges	3,722	1,199	6,693	2,164
Technology development - capital
Cost charges	116	1,529	760	2,464
Marketing staff and administrative services
Cost charges	$ 983	$ 1,024	$ 2,211	$ 2,049