Condensed Consolidated Balance Sheets Balance Sheet Parenthetical - USD ($) $ in Thousands |
Mar. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Allowance for doubtful accounts | $ 972 | $ 1,003 |
| Preferred Stock, Par Value (in usd per share) | $ 0.0001 | $ 0.0001 |
| Preferred Stock, Shares Authorized | 10,000,000 | 10,000,000 |
| Preferred Stock, Shares Issued | 0 | 0 |
| Class B common stock | ||
| Common Stock, Par Value (in usd per share) | $ 0.0001 | $ 0.0001 |
| Common Stock, Shares Authorized | 75,000,000 | 75,000,000 |
| Common Stock, Shares Issued | 13,631,046 | 14,492,846 |
| Common Stock, Shares Outstanding | 13,631,046 | 14,492,846 |
| Class A common stock | ||
| Common Stock, Par Value (in usd per share) | $ 0.0001 | $ 0.0001 |
| Common Stock, Shares Authorized | 750,000,000 | 750,000,000 |
| Common Stock, Shares Issued | 67,904,088 | 65,969,499 |
| Common Stock, Shares Outstanding | 67,904,088 | 65,969,499 |