|6 Months Ended|
Jun. 30, 2018
|Revenue Recognition and Deferred Revenue [Abstract]|
10. Revenue Classes
Selected financial information for the Company’s operating revenue for disaggregated revenue purposes are as follows:
The entire disclosure for deferred revenues at the end of the reporting period, and description and amounts of significant changes that occurred during the reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.
Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef