Major Customers (Narrative) (Details) - Customer Concentration Risk - customer	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Sales Revenue, Services, Net
Concentration Risk [Line Items]
Number of customers	2
Sales Revenue, Services, Net | Major Customer Number One
Concentration Risk [Line Items]
Concentration risk percentage	12.00%
Sales Revenue, Services, Net | Major Customer Number Two
Concentration Risk [Line Items]
Concentration risk percentage	10.00%
Accounts Receivable | Major Customer Number One
Concentration Risk [Line Items]
Concentration risk percentage	20.00%
Accounts Receivable | Major Customer Number Two
Concentration Risk [Line Items]
Concentration risk percentage	1.00%
Major customer, wholesale, number	2
Accounts Receivable | Additional Customer Number One
Concentration Risk [Line Items]
Concentration risk percentage	12.00%
Accounts Receivable | Additional Customer Number Two
Concentration Risk [Line Items]
Concentration risk percentage	11.00%
Customer Number Five | Sales Revenue, Services, Net
Concentration Risk [Line Items]
Number of customers		1
Concentration risk percentage	3.00%	11.00%