Foreign Operations (Tables)
|3 Months Ended|
Mar. 31, 2019
|Segment Reporting [Abstract]|
|Schedule of financial data by geographic area||
Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef