Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies - Additional Information (Details)

v3.5.0.2
Basis of Presentation and Significant Accounting Policies - Additional Information (Details) - Customer Concentration Risk [Member] - Customer
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Revenues [Member]          
Concentration Risk [Line Items]          
Number of major customers 3 2 4 2  
Revenues [Member] | Customer 1 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths) 51.00% 57.00% 30.00% 59.00%  
Revenues [Member] | Customer 2 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths) 37.00% 20.00% 21.00% 22.00%  
Revenues [Member] | Customer 3 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths) 12.00%   18.00%    
Revenues [Member] | Customer 4 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths)     10.00%    
Trade And Other Receivables [Member]          
Concentration Risk [Line Items]          
Number of major customers     2   4
Trade And Other Receivables [Member] | Customer 1 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths)     68.00%   39.00%
Trade And Other Receivables [Member] | Customer 2 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths)     20.00%   25.00%
Trade And Other Receivables [Member] | Customer 3 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths)         18.00%
Trade And Other Receivables [Member] | Customer 4 [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage (in hundredths)         10.00%