Accounts Payable and Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summary of accounts payable and accrued expenses
Accounts payable	$ 380	$ 318
Accrued legal, professional fees and other	522	513
Accrued vacation	21	24
Clinical trial expenses and contract research		39
Accounts payable and accrued expenses, total	$ 923	$ 894