Deferred Revenues and Customer Advances (Tables)
|9 Months Ended|
Sep. 30, 2018
|Deferred Revenues and Customer Advances [Abstract]|
|Schedule of deferred revenues and customer advances||
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