Significant Accounting Policies, Concentrations of Credit Risk, Accounts Receivable (Details)	Jun. 30, 2013	Dec. 31, 2012
Concentration Risk [Line Items]
Minimum percentage of total revenue to be considered significant from one customer (in hundredths)	10.00%
Accounts Receivable [Member] | Comcast [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)	58.00%	52.00%
Accounts Receivable [Member] | Office Max [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)		10.00%