Stockholders' Equity (Deficit) - Warrants (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 11, 2013 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Class of Warrant or Right [Line Items] | ||||
| Expense related to warrant | $ 0 | $ 2,639 | $ 135 | |
| Class A [Member] | ||||
| Class of Warrant or Right [Line Items] | ||||
| Number of securities called by warrant (in shares) | 175,000 | |||
| Exercise price of warrants (in dollars per share) | $ 5.00 | |||
| Class of warrant term (in years) | 10 years | |||
| Expense related to warrant | $ 2,600 | |||