Stockholders' Equity (Details) - USD ($)	3 Months Ended		6 Months Ended
Stockholders' Equity (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Nov. 30, 2019
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 5,000,000.0
Economic interest percentage			29.80%
Non-controlling interest holders
Class of Stock [Line Items]
Economic interest percentage			70.20%
Common Class B
Class of Stock [Line Items]
Antidilutive securities (in shares)	3,724,329	5,988,485	3,724,329	5,988,485
Class C Common Stock
Class of Stock [Line Items]
Antidilutive securities (in shares)	77,791,218	77,791,218	77,791,218	77,791,218
Stock Options
Class of Stock [Line Items]
Antidilutive securities (in shares)	1,078,154	166,827	1,078,154	166,827