Accrued Sales Taxes and Regulatory Fees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Accrued Sales Taxes and Regulatory Fees [Roll Forward]
Accrued sales taxes and regulatory fees	$ 434	$ 739
Collections, net of remittances	(138)	0
Settlements for sales taxes	(8)	(347)
Taxes charged to customers to be remitted to taxing authorities	110	42
Accrued sales taxes and regulatory fees	$ 398	$ 434