Annual report pursuant to Section 13 and 15(d)

Segment Reporting (Narrative) (Details)

v3.8.0.1
Segment Reporting (Narrative) (Details)
12 Months Ended
Dec. 31, 2017
USD ($)
segment
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]      
Number of business segments | segment 2    
Foreign Locations [Member]      
Segment Reporting Information [Line Items]      
Revenue $ 0 $ 0 $ 0
Long lived assets $ 0 $ 0