Revenue Recognition (Tables)
|3 Months Ended|
Mar. 31, 2018
|Revenue Recognition [Abstract]|
|Schedule of Disaggregated by Revenue Source||
As of March 31, 2018 and 2017 the sources of revenue were as follows (in thousands):
Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.
Reference 1: http://www.xbrl.org/2003/role/presentationRef