Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Basis of Presentation and Significant Accounting Policies - Additional Information (Details) - Customer Concentration Risk [Member] - Customer
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Revenues [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Number of major customers 2 3  
Revenues [Member] | Customer 1 [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Concentration risk, percentage (in hundredths) 58.00% 38.00%  
Revenues [Member] | Customer 2 [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Concentration risk, percentage (in hundredths) 42.00% 27.00%  
Revenues [Member] | Customer 3 [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Concentration risk, percentage (in hundredths)   23.00%  
Accounts Receivable [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Number of major customers 2   1
Accounts Receivable [Member] | Customer 1 [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Concentration risk, percentage (in hundredths) 81.00%   85.00%
Accounts Receivable [Member] | Customer 2 [Member]      
Basis Of Presentation And Significant Accounting Policies [Line Items]      
Concentration risk, percentage (in hundredths) 14.00%