Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income tax expense	$ 14,000	$ 20,000
Internal Revenue Service (IRS) [Member]
Operating loss carryforwards, subject to expiration	116,500,000
State and Local Jurisdiction [Member]
Operating loss carryforwards, subject to expiration	$ 111,300,000