Summary of Significant Accounting Policies (Concentrations of Risk) (Details) (Accounts Receivable [Member])	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2013
Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Customer Concentration Risk	7.60%	2.60%
Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Customer Concentration Risk	18.10%	14.50%