Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable - Textual (Details)

v3.7.0.1
Accounts Receivable - Textual (Details)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Four customers | Accounts receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 70.00%  
Customer one | Sales revenue    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 25.00% 35.00%
Customer two | Sales revenue    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 19.00% 32.00%
Customer three | Sales revenue    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Concentration risk, percentage 16.00% 14.00%