Other Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Other accrued expenses
Accrued personnel costs	$ 1,546	$ 2,373
Accrued corporate legal fees and professional services	146	231
Accrued expenses - other	184	285
Other accrued expenses	$ 1,876	$ 2,889