Commitments (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011 item
Estimated future minimum lease payments
2013	$ 41,000
2014	30,000
Total	71,000
Total rent expense	40,000	148,000
Number of separate outside contract manufacturers		2
Minimum purchase requirements for separate outside manufacturing contract	0
Minimum purchase requirements for contract with clinical research organization	$ 0