Fair Value Measurements - Changes in Lender Warrants and Stock Option Awards Liability (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Lender Warrants | ||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Balance as of January 1 | $ 1,614 | $ 0 |
| Issuance of liabilities | 0 | 943 |
| Change in fair value | (482) | 671 |
| Reclassification of liabilities to equity | (1,132) | 0 |
| Balance as of December 31 | 0 | 1,614 |
| Stock Option Liability Awards | ||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Balance as of January 1 | 461 | 0 |
| Issuance of liabilities | 0 | 410 |
| Change in fair value | (173) | 51 |
| Reclassification of liabilities to equity | (288) | 0 |
| Balance as of December 31 | $ 0 | $ 461 |