Major Customers (Details) - Customer Concentration Risk - customer	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Concentration Risk [Line Items]
Number of customers	2	1		1
Revenues | Customer No. 1
Concentration Risk [Line Items]
Concentration risk percentage	17.00%		15.00%
Revenues | Customer No. 2
Concentration Risk [Line Items]
Concentration risk percentage	12.00%		11.00%
Revenues | Customer No. 4
Concentration Risk [Line Items]
Concentration risk percentage		12.00%		11.00%
Revenues | Customer No. 5
Concentration Risk [Line Items]
Concentration risk percentage		10.00%		10.00%
Accounts Receivable
Concentration Risk [Line Items]
Number of customers			1
Accounts Receivable | Customer No. 1
Concentration Risk [Line Items]
Concentration risk percentage			37.00%
Accounts Receivable | Customer No. 2
Concentration Risk [Line Items]
Concentration risk percentage			2.00%
Accounts Receivable | Customer No. 3
Concentration Risk [Line Items]
Concentration risk percentage			12.00%
Accounts Receivable | Customer No. 4
Concentration Risk [Line Items]
Concentration risk percentage				23.00%