Fair Value Measurements - Rollforward (Details) - Level 3 $ in Thousands |
Sep. 30, 2016
USD ($)
|
|---|---|
| Warrant liability | |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Balance at September 28, 2016 | $ 1,223 |
| Change in fair value | 140 |
| Balance at September 30, 2016 | 1,363 |
| Convertible note embedded derivative liability | |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Balance at September 28, 2016 | 3,693 |
| Change in fair value | 430 |
| Balance at September 30, 2016 | $ 4,123 |