Stockholders' Equity - Common Stock - Additional Information (Details) |
12 Months Ended |
|---|---|
|
Dec. 31, 2019
Class
| |
| Class Of Stock [Line Items] | |
| Number of classes | 2 |
| Class A Common Stock | |
| Class Of Stock [Line Items] | |
| Common stock, voting right | one vote for each share |
| Class B Common Stock | |
| Class Of Stock [Line Items] | |
| Common stock, voting right | ten votes for each share |