Revenue (Tables) |
6 Months Ended | |||||||||||||||||||||
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Jun. 30, 2018 | ||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | ||||||||||||||||||||||
| Deferred Revenue, by Arrangement, Disclosure |
Activity in the deferred revenue account was as follows:
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| X | ||||||||||
- Definition Tabular disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- References No definition available.
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