Accounts Payable and Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of accounts payable and accrued expenses
Accounts payable and other accrued expenses	$ 352	$ 318
Accrued legal, professional fees and other	450	513
Accrued vacation	37	24
Clinical trial expenses and contract research	0	39
Accounts payable and accrued expenses, total	$ 839	$ 894