Fair Value Measurements (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Available-for-sale Securities, Gross Realized Gain (Loss) | $ 0 | $ 0 |
| Minimum [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Available-for-sale Securities, Maturity Period | 1 year | |
| Maximum [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Available-for-sale Securities, Maturity Period | 5 years | |