Summary of Significant Accounting Policies - Narrative (Details) |
12 Months Ended | |
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Dec. 31, 2017 |
Dec. 31, 2016 |
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Accounting Standards Update 2014-09 [Member] | ||
New Accounting Pronouncement Or Change In Accounting Principle Recognized As A Percent Of Revenue | 3.00% | 3.00% |
X | ||||||||||
- Definition New Accounting Pronouncement Or Change In Accounting Principle Recognized As A Percent Of Revenue No definition available.
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X | ||||||||||
- Details
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