Related-Party Transactions (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2016 |
Dec. 31, 2015 |
|
| Rent and facility related fees | ||
| Related Party Transaction [Line Items] | ||
| Payments to related party | $ 1.3 | $ 1.2 |
| Investor(s) | Professional fees | ||
| Related Party Transaction [Line Items] | ||
| Payments to related party | $ 0.1 |