Geographic Information (Narrative) (Details) - segment			3 Months Ended		6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Number of business segments					1	2
Revenue [Member]
Segment Reporting Information [Line Items]
Concentration percentage			100.00%	100.00%	100.00%	100.00%
Major Customer, One [Member] | Revenue [Member]
Segment Reporting Information [Line Items]
Concentration percentage			12.00%		14.00%	16.00%
Major Customer, One [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Concentration percentage	13.00%	15.00%
Major Customer, Two [Member] | Revenue [Member]
Segment Reporting Information [Line Items]
Concentration percentage			14.00%	15.00%	14.00%	13.00%
Major Customer, Two [Member] | Accounts Receivable [Member]
Segment Reporting Information [Line Items]
Concentration percentage	10.00%	5.00%
Australia [Member] | Revenue [Member]
Segment Reporting Information [Line Items]
Concentration percentage			11.00%	14.00%	18.00%	17.00%
Canada [Member] | Revenue [Member]
Segment Reporting Information [Line Items]
Concentration percentage			10.00%	5.00%