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)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
Customer
Jun. 30, 2016
Customer
Jun. 30, 2017
USD ($)
Customer
Jun. 30, 2016
Customer
Dec. 31, 2016
Customer
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Loss allocated to participating securities | $ $ 113,000   $ 0    
Contractual obligation | $ $ 0   $ 0    
Customer Concentration Risk [Member] | Trade Receivables [Member]          
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Number of major customers | Customer     1   1
Customer Concentration Risk [Member] | Trade Receivables [Member] | Customer 1 [Member]          
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Concentration risk, percentage (in hundredths)     95.00%   85.00%
Customer Concentration Risk [Member] | Revenues [Member]          
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Number of major customers | Customer 1 2 1 3  
Customer Concentration Risk [Member] | Revenues [Member] | Customer 1 [Member]          
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Concentration risk, percentage (in hundredths) 92.00% 56.00% 90.00% 34.00%  
Customer Concentration Risk [Member] | Revenues [Member] | Customer 2 [Member]          
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Concentration risk, percentage (in hundredths)   15.00%   25.00%  
Customer Concentration Risk [Member] | Revenues [Member] | Customer 3 [Member]          
Basis Of Presentation And Significant Accounting Policies [Line Items]          
Concentration risk, percentage (in hundredths)       21.00%