Stockholders' Equity (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Nov. 30, 2019 |
|
| Class of Stock [Line Items] | |||||
| Stock repurchase program, authorized amount | $ 5,000,000.0 | ||||
| Economic interest percentage | 31.00% | ||||
| Non-controlling interest holders | |||||
| Class of Stock [Line Items] | |||||
| Economic interest percentage | 69.00% | ||||
| Class B Common Stock | |||||
| Class of Stock [Line Items] | |||||
| Antidilutive securities (in shares) | 3,590,909 | 5,988,485 | 3,590,909 | 5,988,485 | |
| Class C Common Stock | |||||
| Class of Stock [Line Items] | |||||
| Antidilutive securities (in shares) | 76,489,218 | 77,791,218 | 76,489,218 | 77,791,218 | |
| Stock Options | |||||
| Class of Stock [Line Items] | |||||
| Antidilutive securities (in shares) | 1,356,781 | 632,847 | 1,356,781 | 632,847 | |