Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | 3 Months Ended | 9 Months Ended | |
|---|---|---|---|---|
Nov. 03, 2016 |
Oct. 31, 2016 |
Dec. 31, 2016 |
Sep. 30, 2016 |
|
| Subsequent Event [Line Items] | ||||
| Stock issued during period, shares, new issues (in shares) | 2,340,980 | |||
| Common stock, par value, average (usd per share) | $ 2.68 | |||
| Proceeds from issuance of common stock | $ 6.3 | |||
| Subsequent Event | ||||
| Subsequent Event [Line Items] | ||||
| Stock issued during period, shares, new issues (in shares) | 68,107 | |||
| Common stock, par value, average (usd per share) | $ 2.60 | |||
| Proceeds from issuance of common stock | $ 0.2 | |||
| Royalty income | $ 0.5 | |||
| Scenario, Forecast | Subsequent Event | ||||
| Subsequent Event [Line Items] | ||||
| Revenue recognized related to milestone | $ 0.1 | |||