Commitments (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Future Minimum Lease Payments [Line Items]
Current portion of capital lease obligation	$ (13)	$ (37)
Long-term portion of capital lease obligation	8	21
Capital Lease Obligations [Member]
Future Minimum Lease Payments [Line Items]
Leases, Future Minimum Payments Due, Next Twelve Months	15
Leases, Future Minumum Payments, Due in Two Years	8
Leases, Future Minimum Payments, Due in Three Years	0
Leases, Future Minimum Payments, Due in Four Years	0
Leases, Future Minimum Payments, Due in Five Years	0
Lease, Future Minimum Payments Due	23
Interest Expense, Lessee, Assets under Capital Lease	(2)
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments	21
Current portion of capital lease obligation	(13)
Long-term portion of capital lease obligation	8
Related Party [Member] | Operating Lease Expense [Member]
Future Minimum Lease Payments [Line Items]
Leases, Future Minimum Payments Due, Next Twelve Months	2,313
Leases, Future Minumum Payments, Due in Two Years	2,386
Leases, Future Minimum Payments, Due in Three Years	2,458
Leases, Future Minimum Payments, Due in Four Years	2,530
Leases, Future Minimum Payments, Due in Five Years	2,380
Lease, Future Minimum Payments Due	12,067
Unrelated Party [Member] | Operating Lease Expense [Member]
Future Minimum Lease Payments [Line Items]
Leases, Future Minimum Payments Due, Next Twelve Months	136
Leases, Future Minumum Payments, Due in Two Years	48
Leases, Future Minimum Payments, Due in Three Years	0
Leases, Future Minimum Payments, Due in Four Years	0
Leases, Future Minimum Payments, Due in Five Years	0
Lease, Future Minimum Payments Due	$ 184