Quarterly report pursuant to Section 13 or 15(d)

Segments - Narrative (Details)

v3.8.0.1
Segments - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2017
USD ($)
Segment
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Number of reportable segments | Segment   2  
Intersegment Elimination      
Segment Reporting Information [Line Items]      
Inter-segment sales   $ 0  
Inter-segment allocation of interest expense   $ 0  
Customer 2 [Member] | Customer Concentration Risk | Sales Revenue, Net      
Segment Reporting Information [Line Items]      
Concentration percentage 10.00% 10.00%  
Customer 1 | Customer Concentration Risk | Sales Revenue, Net      
Segment Reporting Information [Line Items]      
Concentration percentage 10.00% 10.00%  
Customer 1 | Customer Concentration Risk | Accounts Receivable      
Segment Reporting Information [Line Items]      
Concentration percentage   10.00% 10.00%