Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit)	$ 1,482	$ 800
Research and development credit	1,821,000	1,820,000
Domestic Tax Authority [Member]
Income Tax Expense (Benefit)	0	0
Operating Loss Carryforwards	41,082,000
Research and development credit	854,000
State and Local Jurisdiction [Member]
Income Tax Expense (Benefit)	1,482	800
Operating Loss Carryforwards	4,449,000
Research and development credit	$ 968,000