Fair Value of Financial Instruments - Fair Value, Financial Assets, Recurring (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Fair Value, Measurements, Recurring | Money Market Funds | Fair Value, Inputs, Level 1 | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Cash equivalents | $ 5.0 | $ 5.0 |