Concentration of Credit Risk and Major Customers - Narrative (Details)	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014 Net Revenue Customer Concentration Risk customer	Sep. 30, 2013 Net Revenue Customer Concentration Risk customer	Sep. 30, 2014 Net Revenue Customer Concentration Risk Largest Customer Accounting for Most Revenue	Sep. 30, 2013 Net Revenue Customer Concentration Risk Largest Customer Accounting for Most Revenue	Sep. 30, 2014 Net Revenue Customer Concentration Risk Largest Customer Accounting for Most Revenue	Sep. 30, 2013 Net Revenue Customer Concentration Risk Largest Customer Accounting for Most Revenue	Sep. 30, 2014 Net Revenue Customer Concentration Risk Second Largest Customer Accounting for Most Revenue	Sep. 30, 2013 Net Revenue Customer Concentration Risk Second Largest Customer Accounting for Most Revenue	Sep. 30, 2014 Net Revenue Customer Concentration Risk Second Largest Customer Accounting for Most Revenue	Sep. 30, 2013 Net Revenue Customer Concentration Risk Second Largest Customer Accounting for Most Revenue	Sep. 30, 2014 Accounts Receivable Credit Concentration Risk customer	Dec. 31, 2013 Accounts Receivable Credit Concentration Risk customer	Sep. 30, 2014 Accounts Receivable Credit Concentration Risk Customer With Highest Balance Due	Dec. 31, 2013 Accounts Receivable Credit Concentration Risk Customer With Highest Balance Due	Sep. 30, 2014 Accounts Receivable Credit Concentration Risk Customer With Second Highest Balance Due	Dec. 31, 2013 Accounts Receivable Credit Concentration Risk Customer With Second Highest Balance Due
Revenue, Major Customer [Line Items]
Number of customers considered to give rise to concentration risk	2	2									2	2
Percentage of concentration risk			20.00%	16.00%	25.00%	15.00%	18.00%	16.00%	16.00%	13.00%			20.00%	16.00%	12.00%	10.00%